Free UK MOT tool
MOT Advisory & Defect Decoder
Paste the exact wording from an MOT certificate or MOT history. We'll identify recognised defects, explain what they mean and show repair-cost guidance where we have reviewed data.
Copy an advisory, minor, major or dangerous defect exactly as it appears in your MOT history. Paste more than one? Put each defect on its own line and we'll decode all of them.
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What can the decoder explain?
The decoder matches against 564 official DVSA defect records plus our more detailed reviewed guidance. Official matches show the MOT classification and safe component-level guidance; defect-specific repair costs appear only where we have reviewed them.
Brakes
Braking components, operation, wear and security
Tyres & wheels
Tyre condition, tread, wheel and hub defects
Suspension & steering
Springs, dampers, joints, bearings and steering
Lights & electrical
Required lamps, wiring and safety-related electrical faults
Visibility
Windscreen, mirrors, wipers, washers and bonnet security
Body & restraints
Structure, doors, seat belts, airbags and SRS
Exhaust & emissions
Exhaust security, emissions equipment, smoke and DPF-related defects
Other MOT defects
Vehicle identification, fluid leaks and other safety equipment