MOT history and service history answer different questions. The MOT record tells you about periodic test results. Service records help you understand maintenance. When buying a used car, compare both rather than treating one as a substitute for the other.
What is the difference?
| Record | What to use it for | What to question |
|---|---|---|
| MOT history | Past test outcomes, recorded mileage and defects noted at tests. | Repeated advisories, unexplained mileage changes and gaps in the timeline. |
| Service history | Evidence of maintenance recorded by garages, the owner or a manufacturer’s digital system. | Missing invoices, unclear job descriptions and work that cannot be matched to the car. |
| Repair invoices | Evidence of a particular job and the parts charged for. | Whether the invoice identifies the vehicle and explains the work claimed. |
What an MOT pass tells you
An MOT checks specified road safety and environmental standards. The public history gives you a sequence of test results to review. It does not provide a complete maintenance schedule or list every repair made between tests.
Start with our MOT history check guide. Note the latest advisories, then look backwards for patterns. A pass after a failure is a prompt to ask about the repair and supporting paperwork.
What to look for in service history
Ask which records are available before travelling. A seller may have a stamped book, printed invoices, digital entries or a mixture. “Full history” in an advert is a claim to verify: ask what documents support it and which years they cover.
Compare the dates and mileage with the car’s records. Look at what each visit actually included. An invoice for a basic oil change does not by itself establish that every item in the manufacturer’s maintenance schedule was completed.
Check important jobs against the exact model
Maintenance requirements vary by engine, transmission, age and use. Ask a garage or consult the manufacturer’s schedule for the precise vehicle. Avoid applying a service interval quoted for a different version.
If the seller says a major job has been done, ask for the dated invoice showing the registration or another clear vehicle identifier. Where the paperwork is incomplete, get advice on what needs checking and budget for verified work.
Build one timeline from both records
- Write down each MOT date and mileage reading.
- Add the available service and repair dates.
- Compare the mileage recorded on the documents.
- Highlight gaps, contradictory readings and recurring defects.
- Ask the seller for evidence that resolves each point.
For example, if an MOT notes a brake issue and the seller says the brakes were replaced, look for a later invoice identifying the work. The paperwork should support the explanation rather than simply repeat it.
What if the records are incomplete?
Missing paperwork creates uncertainty. It does not establish exactly what was or was not done. Decide which gaps matter for that car, ask whether verifiable digital records are available and consider an independent inspection.
Do not let an attractive price rush the decision. Compare the cost of necessary work with similar cars whose maintenance is better documented. Our used-car model guides can help you prepare questions for your shortlist.
Other checks still matter
Neither a service book nor an MOT pass settles the car’s finance position or proves it has never been damaged. Read our car history guide and outstanding finance guide, then inspect the vehicle itself.
Before viewing, use the car check guide. Before collection, confirm the tax and MOT position. Keeping these tasks separate makes it easier to spot what you have not checked yet.
Official reference: GOV.UK MOT history and MOT test guidance. Reviewed 30 October 2026.