How do I check if a car has a known fault?
Start with the free GOV.UK vehicle recall service, which answers on a registration number alone and covers safety recalls issued by manufacturers. GOV.UK states you will "not usually have to pay for any repairs or parts" on a recall, so an outstanding one is a bill the maker owes rather than one you inherit. Then read the free MOT history, which lists every test since 2005 with the recorded mileage and every advisory — repeat advisories on the same item are the closest thing to a documented fault history a used car has. Neither service lists common design weaknesses, so those need owner forums and the manufacturer's own technical bulletins, and both should be treated as unverified until a mechanic confirms them on the car in front of you.
Three free checks, and what each one misses
All three run on the registration number alone, so you can do them before you travel to see a car. The column that matters is the last one: each service has a blind spot, and knowing which is the difference between a check and a false reassurance.
| Check | What it shows | What it misses |
|---|---|---|
| Safety recalls | Outstanding manufacturer safety recalls on that vehicle | Design weaknesses that never triggered a formal recall |
| MOT history | Every test since 2005, pass or fail, with mileage and advisories | Anything repaired between tests, and the condition of the engine or gearbox |
| Vehicle details | Tax status, MOT expiry, engine size, fuel type and first registration date | Anything about condition |
Sources: GOV.UK — Check if a vehicle has been recalled; GOV.UK — Check the MOT history of a vehicle; GOV.UK — Get vehicle information from DVLA. Re-checked 19 September 2026.
A recall is the seller’s problem, not yours
GOV.UK is explicit that a manufacturer fixes a recall and that you “will not usually have to pay for any repairs or parts”. Recalls attach to the vehicle, so buying it used does not forfeit the entitlement. That turns an outstanding recall from a reason to walk away into a job worth booking — although if the defect is serious the manufacturer writes to the registered keeper telling them not to drive it, and a car in that position is one to leave alone until it is rectified.
What no free check will tell you
None of these lists a design weakness that never became a formal recall, and that is what most people are actually asking about when they search for a fault on one model and engine. Those live in owner forums, specialist mechanics and the manufacturer’s own technical bulletins, and they vary by engine and production year rather than by model name — the same car can be sold with two different engines whose weaknesses have nothing in common.
Treat what you read there as a list of things to check, never as a diagnosis. We publish model fault guides for the most common UK models, each with the symptoms to look for, and the questions worth asking a dealer covers what to do with the answers. For the mileage record specifically, how to tell if a car’s mileage has been altered explains how to read the MOT history for inconsistencies.
Questions people ask
Who pays to fix a safety recall on a used car?
What does a repeat MOT advisory actually tell me?
Can I check a fault before I see the car?
Does a clean record mean the car has no problems?
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