Tyre damaged: bulge, cut or lump
How it can appear on an MOT certificate
- “Tyre has a lump, bulge or tear”
- “Tyre has a cut in excess of the requirements”
- “Tyre damaged”
What it is
A bulge or lump in the sidewall usually means the internal structure of the tyre has been damaged, often by hitting a kerb or pothole. A deep cut can expose the cords inside.
Why it matters
A damaged tyre can fail suddenly, which is dangerous at speed. A bulge or exposed cords is a serious defect and the tyre needs replacing.
What to check when viewing a car
Look carefully at both sidewalls of every tyre, including the inner ones, for bulges or cuts. If the tyres were replaced after this was recorded, ask for the receipt.
Has the car you're looking at had this before?
Free: every MOT, every defect explained in plain English, mileage, tax and ULEZ.
What the MOT categories mean
- Dangerous
- A direct and immediate risk to road safety, or a serious impact on the environment. The car fails and shouldn't be driven until it's repaired.
- Major
- It may affect the car's safety, put other road users at risk or harm the environment. The car fails and should be repaired straight away.
- Minor
- No significant effect on safety or the environment. The car passes, but it should be repaired as soon as possible.
- Advisory
- Something to keep an eye on that could need repairing in future. The car passes.
Related: tyres and wheels
- Tyre worn close to the legal limit
- Tyre worn on the inner or outer edge
- Tyre cracking or perishing
- Wheel bearing has play or is rough
- Tyre pressure monitoring (TPMS) warning light
Buying a used car?
General information about this type of MOT defect, not advice about a particular car. How serious it is depends on the car; have any car you're buying inspected by a qualified mechanic.