Quick answer
If the top mount has excessive movement, worn rubber, noisy bearings or insecure fixing, it may fail the MOT.
Minor wear may become an advisory, but serious looseness or damage can fail.
Common MOT failure reasons
Excessive play
Too much movement in the mount assembly.
Worn bearing
Bearing roughness can affect steering rotation.
Split rubber
Rubber deterioration reducing support.
Loose fixing
Insecure nuts or mounting hardware.
Noise with movement
Clunking or creaking during steering or bumps.
Unsafe condition
Any defect affecting suspension security.
Signs a top mount may be worn
- !Clunking over bumps.
- !Creaking while steering.
- !Heavy or uneven steering feel.
- !Visible mount movement.
- !Knocking from front suspension.
Should you replace before MOT?
If a mechanic has found worn top mounts or the car knocks while turning or over bumps, replacing them before the MOT can help avoid failure.
Top mounts are often changed when replacing suspension struts.
Related suspension guides
Frequently asked questions
Can noisy top mounts fail MOT?
If noise is linked to wear or looseness, yes.
Are top mounts checked on MOT?
Yes, as part of suspension condition checks.
Do top mounts affect steering?
Yes, especially on front strut setups.
Can worn rubber be advisory?
Minor deterioration may be advisory.