MOT defects: Service brake performance (Rbt, Service brake performance)

Brakes

6 defects: 1 dangerous, 5 major. 3 can be given as an advisory instead.

Certificate wording	Severity	As an advisory	Inspection manual
Service brake performance has no recorded effort at a wheel	dangerous	None	Braking effort not recording at a wheel
Service brake performance effort inadequate at a wheel	major	None	Braking effort inadequate at a wheel
Service brake performance grabbing severely	major	requirements only just met. It would appear that the braking system requires adjustment or repair	A brake on any wheel grabbing severely
Service brake performance lagging in operation	major	None	Abnormal lag in brake operation on a wheel
Service brake performance excessively fluctuating	major	fluctuating, but not excessively	Excessive fluctuation in brake effort through each wheel revolution.
Service brake performance excessively binding	major	binding but not excessively	Significant brake effort recorded with no brake applied indicating a binding brake

Pre-2018 names for this part

Dabers ANPR shows the full MOT history, defects included, for the car in any photo. How it works

Contains public sector information from the DVSA licensed under the Open Government Licence v3.0.