What does an MOT check?

What an MOT actually checks

The MOT is a defined inspection of roadworthiness and environmental requirements at the time of the test. For cars and light commercial vehicles the DVSA manual covers vehicle identification, brakes, steering, visibility, lamps and electrical equipment, axles, wheels, tyres and suspension, body and structure, restraints and other equipment, plus noise, emissions and other nuisance items where applicable.

The main inspection areas

Brakes and steering

Testers inspect relevant components and assess braking performance using approved methods. Steering condition, play, steering wheel or column and power-steering systems are also covered.

Visibility, lights and electrical equipment

The driver’s field of vision, windscreen, mirrors, wipers and washers are checked. Lamps include headlamps, position lamps, brake lamps, indicators, hazards and other applicable lights, together with relevant electrical items and warning tell-tales.

Tyres, wheels, axles and suspension

The test covers tyre size/type requirements, tread, condition and applicable TPMS requirements as well as wheels, bearings, axles, springs, dampers and suspension joints. A tyre can have adequate tread and still be defective because of damage or unsuitable fitment.

Structure, restraints and emissions

Body structure, prescribed corrosion areas, doors and catches, seats, exhaust and fuel-system items are included where applicable. Seat belts, airbags/SRS warning systems and other equipment are checked. Emissions, noise, fluid leaks and relevant engine warning indicators are covered under the nuisance section.

What an MOT does not mean

A pass is not a service and is not a guarantee that the vehicle will remain roadworthy for the next year. It does not replace oil changes, filters, manufacturer maintenance, tyre pressure checks or investigation of developing noises and wear. Owners remain responsible for roadworthiness between tests.

What to do next

Use this guide to prepare and ask better questions, not as a remote diagnosis. If a safety-critical defect is suspected, avoid unnecessary driving and arrange a competent physical inspection.