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More servicesWhat Is Checked in an MOT?
17 September 2026 · 4 min read
What the MOT is for
The MOT checks that your car meets the minimum legal standards for safety and emissions on the day of the test. Cars need their first MOT at three years old, then every year after that.
It is not the same as a service. The tester inspects the car but does not change oil, filters or other parts.
Outside and underneath the car
The tester checks all the lights, the tyres and wheels, the brakes, steering and suspension, the exhaust and fuel system, and the body and chassis for corrosion or sharp edges in key areas.
Number plates, the vehicle identification number, mirrors, wipers and washers, and the windscreen are all checked too. Any towbar is inspected as well.
Inside the car
Inside, the tester checks the seatbelts, seats, horn, doors and the dashboard warning lights. Warning lights for things such as the engine, ABS, airbags and power steering must work correctly and not stay lit.
Emissions are tested with the engine running, using a probe in the exhaust for petrol cars and a smoke meter for diesels.
What the MOT does not check
The MOT does not look at the condition of the engine, clutch or gearbox. A car can pass with a cambelt that is overdue, old oil or a clutch that is slipping.
That is why a pass is not a clean bill of health, and why regular servicing still matters.
How long it takes and what you get
The test itself usually takes around 45 minutes to an hour. Afterwards you get a result that lists any failures (dangerous or major defects), plus minor defects and advisories to keep an eye on.
Our guide to MOT advisories and failures explains the difference. To book your MOT with ER Automotive in Smethwick, call 0121 461 6097 or book online.