MOT history vs service history: what each one proves

Buyers frequently treat an MOT record as a service history, and sellers are happy to let them. The two documents answer different questions, and a vehicle can have a flawless MOT record and a neglected engine at the same time.

What the MOT record proves

It proves the vehicle was presented for a statutory safety and emissions test at intervals, and that on each of those days the tested items met the standard. It carries a mileage reading and a list of defects found. It is independent, impossible to edit and available for any registration — which is why it is the most trustworthy part of a used vehicle's file.

What a service record proves

A service record shows what was actually replaced and when: oil, filters, belts, brake fluid, coolant, spark plugs, and the manufacturer's schedule items a test never looks at. It is the only evidence of engine care. Unlike the MOT record it is not centralised, so it depends on the owner keeping invoices — and it can be incomplete or absent for a vehicle that was well maintained.

Why you want both, in the same place

The MOT record tells you the vehicle was legal and what wear was visible. The service record tells you whether the work that prevents wear was done. Read together, they answer the question that matters: was this vehicle maintained because it needed it, or presented for a test because it had to be? Keeping both against the vehicle in one record makes that answer visible to the next buyer, and to you when you are deciding whether a repair is worth doing.