MOT defects: Operation (Air and vacuum systems)

Brakes

4 defects: 1 dangerous, 2 major, 1 minor. 2 can be given as an advisory instead.

Certificate wording	Severity	As an advisory	Inspection manual
Operation has insufficient reserve pressure/vacuum to provide assistance for at least two more brake applications after the warning device has operated (or gauge shows an unsafe reading)	dangerous	None	Insufficient pressure/vacuum assistance for less than two brake applications after warning device has operated (or gauge shows an unsafe reading)
Operation has insufficient reserve pressure/vacuum to provide assistance for at least four more brake applications after the warning device has operated (or gauge shows an unsafe reading)	major	pressure/vacuum assistance close to minimum requirement	Insufficient pressure/vacuum assistance for less than four brake applications after warning device has operated (or gauge shows an unsafe reading)
Operation stored air pressure or vacuum depletes when ancillary equipment is operated	major	None	Repeated operation of any ancillary air or vacuum system completely depletes the stored air or vacuum for the braking system.
Operation has excessive oil discharge	minor	slight discharge of oil	Excessive oil discharge from a compressor or brake valve

Pre-2018 names for this part

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

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