The bearing that lets the wheel spin on the hub is worn. The tester rocks the wheel and spins it by hand — play at the top and bottom or a rumble you can feel through the tyre is enough to record it. Rough is often Minor, actual play is normally Major.
Wording as it commonly appears on an MOT certificate: “Wheel bearing excessively rough or has excessive play”.
What does it mean?
The bearing that lets the wheel spin on the hub is worn. The tester rocks the wheel and spins it by hand — play at the top and bottom or a rumble you can feel through the tyre is enough to record it. Rough is often Minor, actual play is normally Major.
How serious is it?
Usually recorded as: Minor, Major. The tester assesses the actual vehicle on the day, so your certificate is what counts.
What normally causes it?
- Simple mileage — most bearings are good for well over 100,000 miles but not forever
- Kerb strikes and potholes, which brinell the races
- Water ingress past a failed seal, especially after deep floods
- An ABS sensor built into the bearing failing at the same time on modern hubs
What a mechanic would check
Wheel off the ground, hands at twelve and six, then three and nine — top-and-bottom play points at the bearing, side-to-side usually at a track rod end. Then I spin it and listen. On the road, a bearing hum that changes when you swerve gently left and right tells you which side it is: load the bad side and the noise gets louder.
What might need replacing
- A wheel bearing or a complete hub assembly
- An ABS sensor if it's integrated
- A hub nut, which is normally single-use
Can you still drive it?
A grumbling bearing caught early is drivable while you book it in. Detectable play is different — bearings that let go can take the wheel with them, so don't leave it.
Repair cost
Pressed-in bearings need a press or a puller kit, so labour varies a lot by car. Bolt-on hub units cost more in parts but far less in time.
Before the retest
Suspension parts such as springs, shock absorbers and drop links are normally replaced in pairs across an axle so the car sits level and handles evenly. Any work that disturbs the steering or suspension geometry is worth following with a wheel alignment check, otherwise you can pass the retest and still wear out a new pair of tyres within months. Listen for the original knock again on a bumpy road before the retest — if it is still there, something was missed.
Retest rules
If the vehicle stays at the test centre for repair and is retested within 10 working days, a partial retest is often free; some items qualify for a free retest if you bring the car back by the end of the next working day. The exact conditions are set out on GOV.UK, so confirm with the test centre before you leave. A major or dangerous failure means the car cannot legally be driven away unless the previous MOT is still valid and nothing dangerous was recorded — check your certificate first.
Related help
More suspension failures · MOT failure decoder · Ask a mechanic about your certificate
This is general guidance from a UK mechanic, not a substitute for a physical inspection. Only the tester who inspected your vehicle can confirm what was recorded and why.