Quick answer
Before buying a used car from a dealership, ask about service history, MOT advisories, previous repairs, accident damage, warranty cover, finance checks, admin fees, number of keys, ownership history, test drive availability and whether an independent inspection is allowed.
The best questions are direct. Do not just ask “is it a good car?” Ask whether it has had warning lights, overheating, coolant loss, clutch problems, gearbox faults, smoke, oil leaks, brake issues or electrical faults.
What happens in real life at a dealership
The car looks better than it drives
A polished car can still have clutch slip, brake vibration, coolant loss or suspension knocks.
Test drive checklist →The warranty sounds better than it is
Some warranties have claim limits, exclusions, labour caps and diagnosis costs not included.
The MOT is fresh but advisories repeat
Repeated advisories can show a car has been kept just good enough to pass.
MOT advisory meaning →The engine is already warm
A warm engine can hide cold-start smoke, rattles, weak battery and rough idle.
Timing chain rattle guide →The dealer says “all cars do that”
Some noises are normal, but knocks, grinding, smoke, overheating and warning lights need proper answers.
Car noises explained →The monthly payment gets pushed first
Always understand the car, total price, warranty and fees before focusing on finance.
Questions to ask before viewing the car
Ask these before travelling. A straight dealership should be able to answer without rushing you or hiding behind vague wording.
- 1Is the car still available and can I view it in daylight?
- 2Can I see the registration number so I can check the MOT history?
- 3Will the engine be cold when I arrive?
- 4Does the car have full or partial service history?
- 5Are there any known faults, warning lights or recent repairs?
- 6How many keys does the car come with?
- 7Has the car had any accident damage or insurance category history?
- 8Are there any admin fees, preparation fees or compulsory extras?
Before viewing, use how to check MOT history before buying and the full used car inspection checklist.
Service history and MOT questions
Can I see the service history?
Look for invoices, dates, mileage and actual work done. A stamp alone is useful, but invoices tell more.
No service history guide →Has the cambelt been changed?
If the engine uses a cambelt, ask for proof. “It was done” is not the same as an invoice.
Cambelt guide →Were MOT advisories repaired?
Ask which advisories were fixed and whether there are invoices to prove the work.
Buying with advisories →Has it failed an MOT before?
Previous failures are not always bad, but repeated failures for rust, brakes or tyres need caution.
Failed MOT history guide →Does the mileage match the records?
MOT mileage, service invoices and the car’s condition should all tell the same story.
What major work has been done?
Ask about clutch, gearbox, brakes, tyres, suspension, timing belt, DPF, battery and cooling system repairs.
Questions about condition and faults
Do not ask soft questions. Ask about specific faults because this makes it harder to hide behind general sales talk.
- ?Has the engine management light ever come on?
- ?Has the car had overheating, coolant loss or radiator problems?
- ?Does it smoke on cold start or under acceleration?
- ?Are there any oil, coolant, fuel or brake fluid leaks?
- ?Has the clutch, gearbox or flywheel had any work?
- ?Are there any suspension knocks, steering vibration or pulling issues?
- ?Do all electrics, air conditioning, central locking and windows work?
- ?Have any warning lights been diagnosed or cleared recently?
Useful fault guides: engine management light guide, car losing coolant but no leak, exhaust smoke colour guide and why steering wheel shakes.
Questions about the test drive
Can I take a proper test drive?
A short drive around the block may not reveal clutch slip, overheating, brake vibration or suspension noise.
Can I drive from cold?
Cold starts can show smoke, rattles, rough idle, timing chain noise and weak batteries.
Can I test it at different speeds?
Some faults only appear at higher speed, when braking, cornering or driving over rough roads.
Can I bring someone with me?
A second person can listen for noises, check paperwork and spot pressure tactics.
Use the used car test drive checklist during the drive.
Questions to ask about the warranty
The word “warranty” sounds reassuring, but the details matter. Ask exactly what is covered before you rely on it.
- ?How long is the warranty?
- ?What parts are covered and what is excluded?
- ?Is labour included?
- ?Is there a claim limit?
- ?Are diagnosis costs covered?
- ?Does it cover wear-and-tear items?
- ?Can repairs be done at any garage or only an approved garage?
- ?What happens if the fault appears soon after purchase?
If the dealer says “do not worry, everything is covered”, ask to see it in writing.
Questions about finance, fees and payment
What is the total price?
Ask for the full cash price, not only the monthly payment.
Are there any admin fees?
Ask about admin fees, delivery fees, preparation fees, warranty fees or compulsory extras.
Is the car HPI or history checked?
Ask whether it has been checked for finance, theft, write-off status and mileage concerns.
Is the deposit refundable?
Get deposit terms in writing before paying anything.
Do not let finance talk distract you from the condition of the actual car. A cheap monthly payment can still hide an expensive fault.
Ask why the car was traded in
The answer may not tell you everything, but it can reveal useful clues. Some cars are traded in because the owner simply changed vehicle. Others arrive at dealers because expensive work is due.
Part exchange
Ask whether the previous owner traded it in and whether any faults were declared.
Auction purchase
Auction cars are not automatically bad, but history and inspection matter more.
Ex-fleet or company car
May have good service records, but check mileage, wear and use pattern.
Diesel with short journeys
Ask about DPF history if it is a diesel used mainly around town.
DPF warning guide →High-mileage car
Condition and service history matter more than mileage alone.
100k miles guide →Category car
Ask directly if it has ever been recorded as Cat S or Cat N.
Cat S vs Cat N →Dealership red flags
- !The dealer refuses a test drive without a clear reason.
- !The dealer avoids MOT, service history or previous repair questions.
- !The warranty is described verbally but not clearly shown in writing.
- !There are surprise admin fees or compulsory extras late in the process.
- !The dealer pressures you to pay a deposit before proper inspection.
- !The engine is already warm and they cannot explain why.
- !Warning lights stay on or appear during the test drive.
- !The car has repeated MOT advisories for the same problem.
- !The dealer says faults will be fixed after purchase but will not put it in writing.
When to walk away
A dealership car should still stand up to proper checks. Walk away if the answers feel vague, the paperwork does not match, the car has serious symptoms or the dealer is rushing you.
Walk away from unclear paperwork
If service history, MOT mileage, VIN or ownership details do not line up, the risk is not worth guessing.
Walk away from overheating
Overheating can lead to head gasket, cylinder head and cooling system damage.
Overheating causes →Walk away from major warning lights
Oil, airbag, ABS, coolant, battery and engine warning lights should not be ignored.
Warning lights hub →Walk away from pressure
A good car should not need panic tactics, rushed deposits or unclear promises.
Best mechanic-style advice
Do not be embarrassed to ask direct questions. You are not being difficult — you are trying to avoid buying someone else’s expensive problem.
A good dealership should be comfortable with MOT checks, service history questions, a proper test drive and clear warranty wording. If they dodge basic questions, listen to that warning.
Related used car buying guides
Frequently asked questions
What questions should I ask a dealership before buying a used car?
Ask about service history, MOT advisories, previous repairs, accident damage, warranty cover, finance checks, number of keys, ownership history, known faults and whether a proper test drive is allowed.
Should I ask if the car has had warning lights?
Yes. Ask whether warning lights have appeared, been diagnosed or recently cleared. Warning lights can point to engine, ABS, airbag, battery, oil or coolant problems.
Should I ask to see service history?
Yes. Ask for invoices, stamps or digital records showing dates, mileage and the work carried out.
Is a dealer warranty always useful?
It depends on the wording. Ask what is covered, what is excluded, whether labour is included and whether there is a claim limit.
Should I ask if the engine will be cold?
Yes. A cold start can reveal smoke, rattles, rough idle, weak battery and timing chain noise that may be hidden when warm.
Should I ask about MOT advisories?
Yes. Ask whether advisories were repaired and whether invoices are available. Repeated advisories can show poor maintenance.
Can I ask for an independent inspection?
Yes. If the car is expensive, high mileage, Cat S, Cat N or you are unsure, asking for an independent inspection is sensible.
What dealership red flags should I avoid?
Avoid dealers who pressure you, refuse test drives, avoid paperwork questions, give vague warranty answers, hide fees or will not put repair promises in writing.
Should I pay a deposit before seeing the car?
Be cautious. If you do pay a deposit, confirm in writing whether it is refundable and what conditions apply.
When should I walk away from a dealership car?
Walk away if the paperwork does not match, the car overheats, warning lights stay on, the dealer refuses proper inspection or the answers do not feel clear.