Brakes In General

Pressure/Leakdown Testing Specifications

NOTE: if applicable discharge vacuum reservoir by operating brake pedal firmly about 10 times

Force On Pedal approx. 500 N
Equal to line pressure:
Except M3 Models approx. 38 bar
M3 Models approx. 32 bar
Max. pressure drop within 2 min. 8 %
Brake booster function test (with engine running):
Approx. force on pedal 200 N
Line pressure bar:
Except M3 Models:
9 Inch Mastervac (LSC 65): 50 - 60 bar
10 Inch Mastervac (LSC 80): 63 - 73 bar
M3 Models 50 - 60 bar