mechanics.tradeJoints: constant velocity boot split or insecure, no longer prevents the ingress of dirt
This was recorded 527,932 times on cars and light vans in 2025, which makes it number 16 on the list of things that stop a car passing.
527,932recorded in 2025
16on the national list
2.6%of the top forty defects
What the tester is looking at
A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc
What you can do about it
These are the rubber boots that keep grease in and grit out. Caught early they are a small job.
How serious it counts as
The tester records this as a major defect. What the categories mean.
Other things checked on the joints
All forty defects, from 42,728,066 MOT tests in 2025.