Quick answer
Minor sweating may not always fail, but active leaks, low fluid level, noisy steering or impaired steering assistance can lead to failure.
If steering feels heavy, jerky or noisy, inspect it before the MOT.
When a power steering leak can fail MOT
Active fluid leak
Visible leaking fluid from steering components.
Low fluid level
Loss of fluid affecting system operation.
Heavy steering
Steering assistance reduced or lost.
Noisy pump
Whining noises can indicate low fluid or pump wear.
Contaminating brakes
Fluid leaking onto components can be serious.
Unsafe steering operation
Any steering defect affecting control matters.
What MOT testers check
- 1General steering condition and operation.
- 2Leaks from steering components.
- 3Excessive play or looseness.
- 4Steering security and safety.
- 5Visible damage to related parts.
Common causes of power steering leaks
Leaks often come from hoses, pipe joints, rack seals, pump seals or reservoir connections.
Older vehicles may develop leaks as seals harden with age.
How to fix it
Do not rely on topping up repeatedly. Find the leak source and repair it properly.
After repairs, fluid level should be corrected and air bled from the system if required.