Will a Steering Rack Fail an MOT?
Yes. A steering rack can contribute to an MOT failure when the steering gear is not securely attached, steering operation is excessively rough, the rack gaiter has stopped protecting against contamination, the power steering system leaks or malfunctions, assistance is inoperative or excessive steering free play exists.
The severity depends on the actual condition. A deteriorated rack gaiter can remain a Minor defect while it still protects the steering components, whereas dangerous rack movement, seriously affected attachment or steering that can no longer be controlled safely can move the defect into the Dangerous category.
Rack Gaiter Deteriorated
Pass PossibleA gaiter that is damaged or deteriorated can remain Minor while it still performs its protective role against dirt and contamination.
Rack or Assistance Fault
MOT FailureInsecure steering gear, loss of gaiter protection, excessive roughness, hydraulic leakage, power steering malfunction or excessive free play can cause a Major failure.
Steering Control Seriously Affected
Urgent Steering FaultSeriously affected rack attachment, dangerously loose retaining hardware or steering deterioration that compromises safe control can reach Dangerous severity.
Steering looseness can be transmitted through the whole linkage. Before a rack is condemned, the technician should establish whether the movement originates inside the rack, at the rack mounting, in an inner tie rod or at the outer track rod end.
Fresh power steering fluid around the rack, pipes or inside a rack gaiter should be traced to its source. Wiping away fluid before the test does not restore a failed seal, refill a losing system or repair reduced steering assistance.
Steering Rack MOT Defects: Minor, Major and Dangerous
The most useful way to understand steering-rack MOT treatment is to separate rack condition, rack attachment, gaiter protection, power steering operation and steering free play. They are related, but they are not the same failure route.
| Condition | Classification | MOT Result | Practical Meaning |
|---|---|---|---|
| Steering operation excessively rough | Major | Fail | Steering needs diagnosis for rack, joint, assistance or other mechanical restriction. |
| Steering gear casing not properly attached | Major | Fail | Rack mountings, bolts, bushes and supporting structure need inspection. |
| Retaining devices dangerously loose or rack movement relative to body/chassis visible | Dangerous | Fail | Steering gear attachment has deteriorated into a serious control risk. |
| Steering rack gaiter damaged or deteriorated | Minor | Pass possible | Protective rubber needs attention before contamination protection is lost. |
| Rack gaiter missing or no longer preventing dirt ingress | Major | Fail | The protective barrier around the steering components is no longer effective. |
| Power steering fluid leaking or system malfunctioning | Major | Fail | Trace the failed component, joint, seal or assistance fault. |
| Power steering fluid below minimum | Minor | Pass possible | Investigate why fluid level has fallen rather than topping up repeatedly. |
| Power steering reservoir empty | Major | Fail | Hydraulic assistance system requires leak and operation checks. |
| Power steering inoperative | Major | Fail | Determine whether the fault is hydraulic, electrical or mechanical. |
| Power steering inoperative and steering adversely affected | Dangerous | Fail | Loss of assistance is now materially affecting steering control. |
| Steering free play excessive | Major | Fail | Locate the wear or maladjustment within the steering system. |
| Steering free play so excessive that safe steering is affected | Dangerous | Fail | Steering looseness has progressed into a direct control problem. |
The rubber gaiter protects steering components from contamination. On a hydraulic rack, fluid appearing inside that gaiter can point towards an internal rack seal failure. Replacing only the rubber boot will not repair the hydraulic leak.
A Dangerous result is not simply a louder knock or a slightly heavier steering wheel. It reflects advanced deterioration where steering attachment, safe operation or vehicle control is seriously affected.
What Does the MOT Tester Check on a Steering Rack?
The steering rack is assessed as part of the complete steering system. The tester is not simply looking for a leak or listening for a knock. The inspection covers operation, security, free play, gaiter condition, assistance and related steering components.
Does the Steering Move Smoothly?
Steering is operated through its range to identify excessive roughness, restriction or abnormal mechanical behaviour.
Is the Steering Gear Firmly Attached?
The rack casing, mounting points, fixing bolts and surrounding load-bearing structure are checked for secure attachment.
Does the Rack Move Against the Body?
Steering input can reveal unwanted movement between the steering gear and the body or chassis.
Are the Rack Gaiters Still Protective?
Rubber gaiters are checked for deterioration, damage, absence and whether they still prevent road contamination reaching the steering components.
Is Power Steering Fluid Leaking?
Where hydraulic assistance is fitted, failed seals, joints and steering components are checked for leakage and correct operation.
Is the Reservoir Below Minimum or Empty?
A low level and an empty reservoir receive different classifications, making the actual level important.
Is Power Steering Working?
Hydraulic or electric assistance is checked for correct operation, with greater severity where failed assistance adversely affects steering.
How Much Steering Movement Exists?
Free movement at the steering-wheel rim is assessed before the road wheels respond, while built-in movement must not be mistaken for wear.
Is the Fault Actually in the Linkage?
Inner tie rods, outer track rod ends and other steering components can create free play or knocking that may initially be blamed on the rack.
For a standard 380 mm steering wheel, the current inspection guidance uses 13 mm maximum free play for rack-and-pinion steering, or 48 mm where several joints exist between the steering wheel and rack. Different steering-wheel diameters require the limit to be adjusted proportionally.
Knocking can come from rack mountings, inner tie rods, outer track rod ends, suspension joints or the rack itself. The correct workshop diagnosis must identify where the movement begins before an expensive steering rack is authorised.
A rack-related MOT problem can lead to very different repairs depending on whether the fault is a gaiter, mounting, hydraulic seal, inner joint, assistance system or complete steering gear. Parts should follow evidence, not the wording “steering rack” alone.
Can an Insecure Steering Rack Fail an MOT?
Yes. The steering rack must remain securely attached to the vehicle structure. If the steering gear casing is not properly fixed in position, the defect is Major.
This can involve loose mounting bolts, damaged mounting points, failed rack bushes or another condition allowing movement where the steering gear should remain firmly located.
Rack Moves at Its Mounts
Steering input should move the internal rack and linkage, not the complete steering gear against the vehicle structure.
Bolts or Retainers Loose
Loose or damaged fixing hardware can allow unwanted rack movement under steering load.
Steering Gear Not Properly Attached
MajorOnce the rack is no longer properly secured, the vehicle fails the MOT.
Rubber deterioration should be judged by its effect on steering-gear security. The important question is whether the rack remains correctly and firmly attached when steering load is applied.
Controlled steering movement can help separate movement inside the rack from movement of the complete rack casing against its mountings.
When Can Steering Rack Movement Become Dangerous?
Rack security moves beyond a Major defect when the attachment has deteriorated far enough to create a serious steering-control risk.
Dangerously loose retaining devices or visible relative movement between the steering gear and the body or chassis can be classified as Dangerous.
Rack Movement Is Obvious
The steering gear visibly shifts against the body or chassis when steering force is applied.
Mounting Security Seriously Reduced
Fixings or retaining components are no longer reliably keeping the steering gear in its intended position.
Steering Attachment Compromised
DangerousThe fault has progressed into a condition where steering control may no longer remain safely predictable.
If the steering gear is visibly moving against the vehicle structure, arrange repair or appropriate recovery rather than continuing normal driving.
Loose fixings are not the only possible cause. Corrosion, elongated mounting holes or damaged supporting structure can also reduce rack security.
Can a Damaged or Split Steering Rack Gaiter Fail an MOT?
A damaged rack gaiter does not automatically mean a Major failure. The classification depends on whether the protective function remains effective.
A gaiter that is damaged or deteriorated but still keeps contamination away can be recorded as Minor. If it is missing or no longer prevents dirt entering, the defect becomes Major.
Rubber Aged or Cracked
Ageing, cracking or surface deterioration can appear before the seal has completely failed.
Protection Still Effective
Where the gaiter remains protective despite deterioration, the defect can remain Minor.
Dirt Protection Lost
A missing or open gaiter that no longer keeps contamination away from the steering components causes a Major failure.
The gaiter protects steering components from road contamination. If hydraulic power steering fluid is found inside the gaiter, suspect an internal rack seal leak rather than treating the rubber boot as the source.
A fresh boot may hide the evidence temporarily, but it will not repair a leaking rack seal or stop hydraulic fluid collecting inside the gaiter.
Can a Power Steering Leak Fail an MOT?
Yes. Where a power steering component, joint or seal has failed and fluid is leaking, the defect can be classified as Major.
The fluid level itself is also important. A level below the minimum mark is treated differently from a completely empty reservoir.
Component or Seal Failed
MajorHydraulic fluid escaping because a steering component, connection or seal has failed can cause an MOT failure.
Below Minimum Mark
MinorA low fluid level is a warning that the hydraulic system should be checked for loss or leakage.
Reservoir Has No Fluid
MajorAn empty power steering reservoir moves the condition into the Major category.
If the fluid level continues falling, the system is losing fluid somewhere. Check the rack, hoses, pipes, pump connections and seals rather than repeatedly restoring the level without fixing the cause.
Hydraulic fluid can spread along the rack, subframe and gaiter. Trace the highest fresh wet point before cleaning so the failed component is not misidentified.
Can Failed Power Steering Cause an MOT Failure?
Yes. If the fitted power steering system is inoperative, the condition is normally a Major defect.
If the failure of assistance has progressed far enough that steering is adversely affected, the severity can become Dangerous.
Pump or Pressure Lost
Hydraulic systems can lose assistance through fluid loss, pump failure, pressure faults or rack problems.
EPS Assistance Failed
Electric steering does not need hydraulic fluid, but failure of the assistance system can still create an MOT defect.
Steering Adversely Affected
Where loss of assistance materially affects safe steering control, the condition can reach Dangerous severity.
Assistance faults can come from a hydraulic pump, electric motor, control module, low voltage, sensor fault, steering joint or mechanical rack problem. Diagnose the system before replacing the complete rack.
If assistance disappears suddenly or steering becomes abnormally difficult to control, treat it as a steering-system fault rather than simply an inconvenience.
Can Excessive Steering Play Fail an MOT?
Yes. Excessive free movement at the steering wheel before the road wheels respond is a Major MOT defect.
If the free play becomes so great that safe steering is affected, the defect can become Dangerous.
13 mm Reference
For a standard 380 mm steering wheel, rack-and-pinion steering uses a 13 mm free-play reference.
48 mm Reference
Where several joints exist between the steering wheel and rack, the current reference for the same steering-wheel diameter is 48 mm.
Safe Steering Affected
Extremely excessive free play that compromises safe steering moves the defect into the Dangerous category.
| Steering Condition | MOT Meaning | Diagnostic Direction |
|---|---|---|
| Small designed movement | Not automatically a defect | Distinguish built-in clearance from wear |
| Excessive steering free play | Major | Trace wear through rack, inner joints, outer joints and column |
| Free play affecting safe steering | Dangerous | Repair before further normal driving |
Movement can come from the column, universal joints, rack, inner tie rods, outer track rod ends or other linkage components. Trace the movement before approving a rack replacement.
Recording the steering movement and then watching each joint while the wheel is gently moved can show where the delay begins and prevent a serviceable rack being replaced unnecessarily.
What Are the Common Signs of a Steering Rack Problem?
Steering rack faults can show up as knocking, vague steering, heavy assistance, fluid loss, uneven tyre wear or unwanted movement in the steering linkage.
None of those symptoms proves the rack itself has failed. The same behaviour can come from inner tie rods, outer track rod ends, column joints, power steering components or suspension wear.
Knock During Steering
Rack mountings, inner joints or internal steering-gear wear can produce a knock as steering load changes direction.
Vague or Delayed Response
Free movement somewhere in the steering system can introduce a delay between steering-wheel input and road-wheel movement.
Heavy Steering
Hydraulic pressure loss, EPS faults, mechanical binding or rack damage can all increase steering effort.
Power Steering Fluid Loss
Fluid around the rack, pipes or inside a gaiter can point towards an internal or external hydraulic leak.
Uneven Front Tyre Wear
Steering looseness or incorrect geometry can contribute to accelerated inner- or outer-edge tread wear.
Visible Rack or Joint Play
Physical movement seen while steering load is applied gives far stronger evidence than noise alone.
A comparatively inexpensive inner tie rod, outer track rod end, mounting bush or hydraulic pipe can mimic a much more expensive rack fault. Identify where the problem starts before ordering the steering gear.
Follow movement from the steering wheel through the column, steering gear, inner tie rods and outer joints to the road wheels. The component that fails to transfer movement accurately is the one that deserves closer inspection.
Can a Steering Rack Cause Knocking or Clunking?
Yes, but the source needs to be isolated carefully. A knock around the steering rack area can come from rack mounting movement, worn inner tie rods, internal rack wear or another front suspension component.
Rack Moves Against the Body
Failed bushes, loose fixings or damaged mounting points can allow the complete steering gear to shift when steering load changes.
Inner Tie Rod Knocks
Free play in the inner joint can produce a knock close to the rack even when the steering gear itself remains serviceable.
Mechanical Wear Inside the Gear
Internal wear can create movement or roughness, but this should only be diagnosed after external joints and mountings have been checked.
Sound travels through the subframe and steering linkage. A worn ball joint, lower-arm bush or anti-roll-bar link can sound as if it comes directly from the rack.
Small steering inputs can reveal whether the rack casing moves against its mounts or whether the movement is concentrated in an inner steering joint.
Does Heavy Steering Mean the Steering Rack Is Faulty?
Not necessarily. Heavy steering tells you that the steering system needs diagnosis, but it does not identify the rack by itself.
The increased effort can come from hydraulic pressure loss, an electric assistance fault, low fluid, pump failure, mechanical binding, tyre pressure or a seized steering or suspension joint.
Assistance Pressure Low
A leaking system or weak pump can reduce assistance even when the rack itself remains mechanically intact.
EPS Assistance Fault
Electric steering systems can become heavy because of motor, sensor, voltage or control faults without any hydraulic leak being present.
Steering Binding
Roughness or restriction inside the rack, column joints or suspension steering points can increase effort mechanically.
A sudden assistance loss can change how much force is needed to control the vehicle, especially at low speed. Do not assume it is simply an ageing rack.
Tyre pressures, fluid level, warning lights and assistance operation are quick checks that can narrow the diagnosis before deeper steering work is authorised.
Power Steering Warning
Power Steering Leak & MOT
What Does Power Steering Fluid Inside a Rack Gaiter Mean?
On a hydraulic steering rack, power steering fluid collecting inside the gaiter can indicate an internal rack seal leak.
The rubber gaiter itself is a protective cover around the rack end and inner steering joint. It is not designed to contain hydraulic system pressure.
Normal Protective Boot
The gaiter should primarily protect steering components from dirt, road water and debris.
Fluid Collected Inside
Hydraulic fluid behind the boot suggests leakage from inside the rack rather than ordinary external contamination.
Inspect Internal Rack Seal
The rack needs further assessment to establish whether the internal seal has failed and whether replacement or specialist repair is appropriate.
Releasing trapped hydraulic fluid may remove visible evidence temporarily, but it does not repair the internal leak and can compromise the gaiter's protective function.
The boot can temporarily contain leaking fluid around the rack end, so a vehicle may have an internal steering-rack leak without leaving a large obvious puddle underneath.
Steering components can become contaminated by engine oil, gearbox oil, grease or road residue from elsewhere. Identify whether the liquid is actually power steering fluid before authorising rack replacement.
Steering Rack vs Inner Tie Rod: Where Is the Play Coming From?
The inner tie rod attaches directly to the rack and sits beneath the rack gaiter, so wear there can easily be described incorrectly as “steering rack play”.
Joint Wear at Rack End
The steering rack itself can remain secure while the inner articulation develops free movement.
- Movement occurs at the inner steering joint.
- Outer track rod end may still be tight.
- Knocking can appear close to the rack.
- Toe and steering accuracy can be affected.
Gear or Mounting Fault
A rack fault may involve internal gear wear, rough operation, mounting movement, hydraulic leakage or an assistance-related problem.
- Rack casing may move at mountings.
- Hydraulic fluid may leak from internal seals.
- Steering can feel rough or bind.
- Internal steering play may remain after joints are confirmed sound.
Where the rack itself is secure and operating correctly but an inner tie rod has excessive play, repair should target the worn joint rather than automatically replacing the complete steering gear.
Controlled steering input while observing the inner joint can show whether free movement occurs before the rack bar itself responds.
Steering Rack vs Track Rod End: Which Part Is Actually Worn?
Outer track rod end wear is one of the most common steering faults that can be mistaken for a rack problem because the looseness is transmitted through the whole linkage.
Visible Play at Track Rod End
If the ball stud moves excessively inside the outer joint housing, the fault is at the track rod end rather than the rack.
Outer Joint Tight but Play Remains
Trace the movement further inboard towards the inner tie rod and steering gear when the outer joint is serviceable.
Both Repairs Affect Toe
Track rod end or inner steering work can alter wheel toe, so geometry should be checked after the mechanical fault is repaired.
If the outer joint visibly moves before the rest of the linkage responds, there is little value in diagnosing a rack fault until that confirmed steering-joint play is addressed.
On a neglected front end, an outer track rod end and an inner joint can be worn at the same time. Continue checking the complete linkage even after finding one obvious fault.
Outer Joint Rules
Wheel Alignment & MOT
What Should Be Checked After Steering Rack or Tie Rod Repair?
Steering work is not complete simply because a replacement part has been fitted.
The repair should be confirmed through rack security, joint play, assistance operation, leak checks, steering-wheel position and wheel alignment.
Rack Firmly Mounted
Recheck mounting bolts, bushes and supporting structure so the steering gear remains fixed under load.
Original Looseness Removed
Confirm unwanted movement has disappeared from the rack, inner joints or outer steering joints that were repaired.
No Fresh Fluid Leakage
On hydraulic systems, clean the repaired area and recheck for fresh fluid around the rack, pipes and gaiters.
Steering Effort Normal
Hydraulic or electric assistance should operate consistently without abnormal heavy spots or warning indications.
Toe Correctly Set
Rack, inner tie rod or outer track rod work can alter geometry, making alignment an important final step.
Steering Tracks Normally
Confirm that knocking, wandering, heavy steering or off-centre steering behaviour has genuinely been resolved.
A new steering rack will not repair worn outer track rod ends, suspension ball joints, wheel bearings or other steering linkage faults that were present at the same time.
If the steering is still heavy, knocks remain or the vehicle still wanders after repair, return to the diagnostic process rather than replacing another major steering component by assumption.
What Can You Check Before the MOT if You Suspect a Steering Rack Fault?
An owner can gather useful evidence before the test without trying to dismantle or condemn the steering rack.
Concentrate on steering effort, fluid loss, knocking, steering-wheel free movement, warning lights and how accurately the car follows steering input.
Check Steering Effort
Note whether the steering has become unusually heavy, inconsistent or noticeably harder in one direction.
Look for Fluid Loss
On hydraulic systems, inspect the reservoir level and look for fresh fluid around the rack, pipes, subframe and steering gaiters.
Listen for Steering Knocks
Note whether knocking appears during low-speed steering, direction changes or driving over uneven surfaces.
Note Steering Free Movement
Excessive movement at the steering wheel before the road wheels respond deserves inspection, but the source still needs to be traced.
Check Warning Lights
Electric power steering faults can illuminate a steering warning lamp even where no hydraulic leak exists.
Review MOT History
Previous steering, gaiter, power steering or linkage advisories can show whether the fault has been developing across several tests.
Rack and linkage checks involving steering movement should be carried out with the vehicle safely positioned and supported. Leave underside movement checks to a workshop if safe access is not available.
“The steering is heavy at parking speed, fluid level is dropping and the left gaiter looks wet” is more useful than simply asking for a steering rack replacement.
What Is the Correct Steering Rack Diagnostic Process?
The diagnosis should establish whether the rack itself is faulty or whether the symptom is being created by a mounting, inner tie rod, outer track rod end, hydraulic component or assistance fault.
Confirm the Driver Complaint
Identify whether the main problem is looseness, knocking, heavy steering, leakage, warning lights or inconsistent assistance.
Inspect Rack Security
Watch the steering gear and its mountings while controlled steering load is applied.
Trace Steering Play
Follow free movement through the column, rack, inner joints and outer track rod ends rather than assuming the rack is the source.
Inspect Rack Gaiters
Check deterioration, splitting, sealing and whether hydraulic fluid has collected inside either gaiter.
Check Hydraulic System
Confirm reservoir level, hose condition, rack seals, joints and pump-side leakage where hydraulic assistance is fitted.
Check Electric Assistance
On EPS systems, scan relevant steering modules and assess voltage, sensor, motor and assistance faults before condemning the rack.
Check for Mechanical Binding
Separate genuine rack roughness from seized joints, column problems or suspension components that make steering heavy.
Confirm the Failed Component
Decide whether the repair is a gaiter, mounting, inner joint, hydraulic line, assistance component or complete steering rack.
Plan Alignment and Calibration
Rack removal or steering-joint replacement can affect wheel geometry, and some electric systems may also require vehicle-specific setup after repair.
Rack replacement is one of the more expensive steering repairs. Confirm mountings, tie rods, leakage source and assistance operation first.
If only one inner joint has free play or one hydraulic pipe is leaking, replacing the entire rack may not be necessary.
What Steering Rack Faults Should Be Repaired Before the MOT?
Repair confirmed Major or Dangerous steering defects before presenting the vehicle rather than relying on cleaning, topping up fluid or clearing a warning light.
Insecure Steering Rack
Restore proper steering-gear attachment and inspect the mountings and supporting structure.
Protection Lost
Replace a gaiter that no longer protects steering components and inspect the joint beneath it for contamination or wear.
Active Steering Leak
Trace and repair the failed seal, pipe, joint or rack component causing hydraulic fluid loss.
Power Steering Inoperative
Diagnose and restore the assistance system rather than presenting the vehicle with a known power steering failure.
Excessive Steering Free Play
Locate and repair the worn rack, joint or linkage component before the test.
Safe Steering Compromised
Dangerous rack movement, attachment failure or steering control problems require urgent repair rather than normal road use.
Minor deterioration can become more expensive once contamination reaches a steering joint or a small hydraulic loss develops into a larger leak.
Gaiter, Inner Tie Rod, Mounting, Seal or Complete Rack: What Should Be Repaired?
“Steering rack fault” covers several very different repairs. The correct choice depends on what testing actually proves.
Protective Boot Only
Appropriate where the rubber gaiter has failed but the steering joint and rack underneath remain mechanically sound.
Inner Tie Rod
Replace the inner steering joint where play is isolated there and the rack itself remains serviceable.
Rack Bush or Fixing
Where the steering gear is moving because a mounting or retaining component has failed, repair the attachment rather than the internal rack.
Pipe, Joint or Seal
External hydraulic leaks should be traced to the failed connection, hose, pipe or steering component before the rack is condemned.
Internal Rack Fault
A professionally reconditioned rack can be a practical option where internal wear or hydraulic seal failure makes rack replacement necessary.
New or Replacement Assembly
Appropriate where the steering gear itself is damaged, excessively worn, internally leaking or has an assistance fault that cannot economically be repaired separately.
| Confirmed Finding | Likely Repair | Why |
|---|---|---|
| Gaiter damaged, rack dry and joint sound | Rack gaiter | Protective fault only |
| Inner joint has excessive play | Inner tie rod | Wear isolated outside the steering gear mechanism |
| Rack moves at mounting | Bush, fixing or structural repair | Attachment fault rather than internal rack wear |
| Hydraulic fluid inside gaiter | Rack seal repair or rack replacement | Internal hydraulic leakage suspected |
| Confirmed internal wear or serious rack fault | Reconditioned or replacement rack | Steering gear itself no longer serviceable |
| Electric rack assistance fault | Vehicle-specific EPS repair or rack assembly | Depends on motor, sensor, electronics and rack design |
A new rack will not remove free play in worn outer track rod ends, suspension joints or wheel bearings.
Part price is only one factor. Labour, alignment, coding or calibration, replacement tie rods and warranty terms can change which option offers better value.
Do You Need Wheel Alignment After Steering Rack Replacement?
Yes — wheel alignment should normally be checked after steering rack replacement or tie-rod work.
Removing the rack or disturbing inner and outer steering adjustments can alter wheel toe and steering-wheel position.
Steering Geometry Changes
Tie-rod length directly affects where each front wheel points relative to the vehicle centreline.
Centre Position Matters
Alignment should leave the steering wheel correctly positioned while the vehicle travels straight ahead.
Protect the New Repair
Incorrect toe after steering work can rapidly damage front tyres even though the replacement rack itself is functioning correctly.
Wheel geometry should only be finalised once rack security, steering joints and suspension components are mechanically sound.
Treating alignment as part of the steering-rack repair avoids completing major steering work only to leave the vehicle with incorrect toe or an off-centre steering wheel.
How Much Does Steering Rack Repair or Replacement Cost in the UK?
Steering-rack costs vary much more than a simple outer steering-joint repair. For planning purposes, a complete rack replacement can commonly fall around £400–£1,200+, with some straightforward applications lower and complex electric, premium or new-OEM systems significantly higher.
These are Motor Vehicle Expert planning figures rather than fixed quotations. The real bill depends on the failed component, rack type, labour access, whether the subframe needs lowering, parts choice, alignment and any coding or calibration required afterwards.
Gaiter / Mounting / Joint
£80–£300+Broad planning exposure where the complete steering rack itself remains serviceable.
Typical Mainstream Car
£400–£800+A reconditioned rack can reduce parts cost where a suitable quality unit is available and the vehicle does not require unusually complex labour.
Complex Rack Replacement
£800–£1,500+Premium vehicles, new OEM racks and electrically assisted steering can move well beyond ordinary mainstream-car pricing.
| Repair Route | Planning Exposure | Main Cost Driver | Confirm Before Authorising |
|---|---|---|---|
| Gaiter / small mounting repair | £80–£300+ | Labour access and component condition | Rack itself remains sound |
| Inner tie rod work | Usually below complete rack cost | Parts, access and alignment | Play isolated at inner joint |
| Reconditioned hydraulic rack | £400–£800+ | Rack price, labour and alignment | Internal rack fault confirmed |
| New / premium rack | £800–£1,500+ | OEM parts and labour complexity | Vehicle-specific quotation |
| Electric steering rack | Highly vehicle dependent | Motor, electronics, coding and calibration | EPS fault diagnosis completed |
| Alignment after repair | Additional cost | Geometry equipment and adjustment | Mechanical steering repair completed first |
Ask what evidence rules out the inner tie rods, outer track rod ends, mounting bushes, hydraulic pipes or assistance components before approving a four-figure steering repair.
Labour, alignment, fluid, tie rods, coding and calibration can materially change the final bill even when two garages quote similar rack prices.
What Happens After a Steering Rack MOT Failure?
Once the failed steering defect has been repaired, the vehicle can return for the appropriate MOT retest.
Repaired at the Test Centre
Free Partial RetestIf the vehicle remains at the same test centre for repair and is retested within 10 working days, only a partial retest is required and no retest fee is charged.
Return Within 10 Working Days
Partial Fee Can ApplyIf the vehicle is taken away for repair and returned to the same test centre within 10 working days, only a partial retest is required but a partial fee can be charged.
Full MOT Again
Full Fee Can ApplyOutside the qualifying retest arrangements, another full MOT test is normally required.
Do not assume that taking the car away for rack repair and returning the next working day automatically produces a free partial retest. The normal retest arrangements apply unless another failed item separately qualifies.
Seriously insecure steering gear or steering that cannot be controlled safely should be repaired or recovered appropriately rather than driven simply because a previous MOT certificate has not yet expired.
Should You Buy a Used Car With a Steering Rack Fault?
A steering rack warning on a used car deserves proper diagnosis before purchase because the cost exposure can range from a relatively small gaiter or tie-rod repair to a complete hydraulic or electric steering-rack replacement.
Check for Play or Binding
Steering should respond accurately without excessive dead movement, notchiness or unusually heavy sections.
Look for Fluid Loss
On hydraulic systems, inspect the reservoir and rack area rather than accepting repeated topping-up as normal.
Check Warning Lights
EPS warnings can point towards sensor, motor, voltage, electronics or complete rack-assistance faults.
Inspect Front Tyre Wear
Uneven wear can reveal poor alignment or steering looseness that has existed for some time.
Check Repeat Steering Advisories
Repeated steering, power steering, tyre or suspension notes can reveal a problem that has been deferred rather than recently developed.
Ask Exactly What Was Diagnosed
“Steering rack issue” is too vague. Ask whether the confirmed problem is the rack itself, inner joint, mounting, gaiter, leak or power assistance.
A split gaiter or worn inner tie rod can be manageable. An electric rack, internal hydraulic failure or badly insecure steering gear can expose the buyer to a much larger bill.
If the rest of the steering and suspension is sound, the repair is clearly identified and the price reflects the work required, a steering fault does not automatically make the car a poor buy.
Check Previous Tests
Assess Steering Behaviour
Inspect the Whole Vehicle
Steering Rack, Power Steering & Front-End MOT Guides
Use the guide that matches the actual failed component. Steering rack insecurity, hydraulic leakage, power-assistance faults, outer track rod wear, ball-joint movement and wheel-bearing play can all affect steering behaviour, but they need separate diagnosis and MOT interpretation.
Steering Rack & MOT
This page owns steering-rack security, gaiter condition, hydraulic rack leakage, power-assistance faults and steering free-play interpretation.
Outer Steering Joint MOT
Use this when free play is isolated at the outer steering ball joint rather than inside the steering rack.
Hydraulic Leak MOT Rules
Use the dedicated leak guide when the main issue is fluid loss from a hydraulic steering component, pipe, joint or seal.
Suspension Joint MOT
Suspension ball-joint wear can create wheel movement and steering looseness that may initially be blamed on the rack.
Hub Play & Roughness
Wheel-bearing play can be transmitted through the road wheel and must be separated from steering-linkage free movement.
Wider Front-End MOT
Use the wider suspension guide when several bushes, joints or mounting points may be contributing to steering instability or front-end play.
Steering movement can travel through the rack, inner tie rods, outer track rod ends, wheel hubs and suspension. Confirm which component actually moves incorrectly before approving an expensive steering repair.
More UK Steering, Alignment & Diagnostic Guides
Continue with the guide that matches the next question: warning lights, wheel alignment, steering vibration, pulling, MOT preparation or wider diagnosis.
Power Steering Warning
Use this when electric or electro-hydraulic steering assistance has triggered a dashboard warning.
Alignment & MOT
Steering rack and tie-rod work can alter toe, making alignment an important final repair step.
Steering Wheel Shake
Use this when vibration is the main symptom and tyres, brakes, wheels, bearings or suspension may be responsible.
Car Pulling to One Side
Steering wear, tyre condition, suspension faults and alignment can all contribute to poor straight-line tracking.
Prepare for the MOT
Work through the wider vehicle checks before presenting the car for its annual MOT.
Diagnose the Vehicle
Use the Motor Vehicle Expert diagnostic tools where the symptoms extend beyond a specific steering-rack or MOT question.
Steering Rack & MOT FAQs
Can a steering rack fail an MOT?
Yes. A steering rack can fail an MOT if the steering gear is insecure, operation is excessively rough, the rack gaiter no longer protects against dirt, the power steering system leaks or malfunctions, steering assistance fails or excessive steering free play is present.
Can an insecure steering rack fail an MOT?
Yes. A steering gear casing that is not properly attached is a Major MOT defect. If retaining devices are dangerously loose or visible movement exists between the steering gear and the body or chassis, the defect can be Dangerous.
When can steering rack movement become Dangerous?
Steering rack security becomes Dangerous when the attachment has deteriorated beyond ordinary insecurity, such as dangerously loose retaining devices or visible movement between the steering gear and the vehicle structure that creates a serious steering-control risk.
Can a damaged steering rack gaiter fail an MOT?
A steering rack gaiter that is damaged or deteriorated can be recorded as a Minor defect while it still protects the steering components from contamination. If the gaiter is missing or no longer keeps dirt out, the classification becomes Major.
Can a split steering rack gaiter fail an MOT?
A split gaiter does not automatically receive the same result in every case. Damage that still leaves the protective function effective can be Minor, while a split that means dirt can enter the steering joint or rack area can become Major.
Will a missing steering rack gaiter fail an MOT?
Yes. Where a steering rack gaiter is missing and the steering components are no longer protected from dirt entering, the defect is Major.
Can a leaking power steering rack fail an MOT?
Yes. A power steering fluid leak caused by a failed component, joint or seal can be a Major defect. The leak should be traced properly because fluid around a rack gaiter may come from an internal rack seal rather than the gaiter itself.
Is low power steering fluid an MOT failure?
Power steering fluid below the minimum mark is currently a Minor defect. If the reservoir is empty, the defect becomes Major. A falling fluid level should still be investigated because it normally indicates leakage somewhere in the hydraulic system.
Can power steering failure cause an MOT failure?
Yes. Inoperative power steering is a Major defect. If the loss of assistance has progressed far enough that steering is adversely affected, the defect can become Dangerous.
Can heavy steering fail an MOT?
Heavy steering can lead to an MOT failure where it results from inoperative assistance, excessive roughness or another steering-system defect. The cause should be confirmed because tyres, suspension joints, hydraulic faults and electric power steering faults can all make steering heavy.
Can excessive steering rack play fail an MOT?
Yes. Excessive free play in the steering system is a Major defect. If the free play becomes so excessive that safe steering is affected, the classification becomes Dangerous.
How much steering wheel free play is allowed on rack and pinion steering?
For a standard 380 mm steering wheel, the current MOT manual gives a maximum of 13 mm free play for rack and pinion steering, or 48 mm where several joints exist between the steering wheel and rack. The permitted amount is adjusted for different steering wheel diameters.
Can steering rack mounting bushes fail an MOT?
They can contribute to failure if the rack or steering gear is no longer properly attached. The key issue is whether the steering gear remains securely fixed to the vehicle rather than whether a rubber bush merely looks aged.
Can fluid inside a steering rack gaiter mean the rack is leaking?
Yes. On a hydraulic rack, power steering fluid collecting inside a gaiter can indicate that an internal rack seal is leaking. The gaiter itself normally contains grease and protects steering components; it should not be treated as the source of hydraulic fluid.
Can an electric steering rack fail an MOT?
Yes. Electric steering racks do not use hydraulic power steering fluid, but steering assistance, rack security, steering play, mechanical operation and electronic power steering faults can still affect the MOT.
Should I repair a steering rack fault before the MOT?
Yes if diagnosis confirms excessive play, rack insecurity, a failed gaiter seal, a hydraulic leak, loss of steering assistance or another defined steering defect. Steering faults should be repaired according to their mechanical condition rather than simply cleared or cleaned before test day.
How much does steering rack repair cost in the UK?
Steering rack repair cost varies widely because the fault may involve a gaiter, inner tie rod, mounting, hydraulic pipe, rack seal, electric assistance component or complete rack. Labour access, wheel alignment and whether a new, reconditioned or replacement rack is used can significantly affect the total.
Should you buy a used car with a steering rack fault?
A steering rack fault should be diagnosed before purchase because the repair exposure can range from a relatively small gaiter or joint problem to an expensive hydraulic or electric rack replacement. Check steering play, assistance, leaks, tyre wear, alignment and previous MOT history before deciding.