A preparation guide to tyres, lamps, visibility, brakes, suspension and warning systems checked during an MOT.
Where to look before an MOT
Rather than guessing which defect is statistically most common, focus on the areas an owner can sensibly inspect: tyres, lamps, visibility, warning lamps, number plates and obvious condition problems. The test also covers brakes, steering, suspension, structure, restraints and emissions, which may require professional equipment or access.
Tyres and wheels
Check tread at several positions, sidewalls, pressure and unusual wear. Do not assume a tyre is acceptable just because the outer edge looks healthy. Inner-edge wear can be easy to miss, and structural damage can make a tyre unsafe even with legal tread.
Lights and visibility
Walk around the vehicle with all relevant lamps operated. Replace failed bulbs where appropriate and investigate repeated failures. Fill screenwash, inspect wiper blades and clean glass and mirrors. Windscreen damage and anything that materially obstructs the driver’s view deserve attention before test day.
Warning lights and mechanical symptoms
Do not clear a warning lamp merely to hide a fault. ABS, SRS, ESC, engine/emissions and TPMS indications can be relevant depending on the vehicle. Grinding brakes, pulling, steering play, knocks or excessive bounce are reasons for inspection rather than hoping the MOT identifies the cause.
A sensible preparation strategy
Do the simple owner checks first, then book professional diagnosis for anything uncertain. This avoids spending money replacing parts by guesswork and keeps the focus on roadworthiness rather than simply obtaining a certificate.
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.
Sources and review
Reviewed 2026-08-29 · DVSA MOT inspection manual · GOV.UK roadworthiness guidance