Description & Operation

WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2005 Audi allroad, 2004 Audi allroad, 2004 Audi A6, 2003 Audi allroad, and 2003 Audi S6. However, it is still accessible from the selected car via links, so may be relevant.

All models have self-adjusting front and rear disc brakes. The cable actuated parking brake mechanically activates the rear calipers.

Hydraulic system uses a tandem master cylinder with vacuum assist. Hydraulic system is diagonally split. Left front and right rear wheels form one circuit. Right front and left rear wheels form the other circuit. The brake pressure regulator has been deleted, as regulation function has been replaced by ABS control module programming.

Turbocharged models are equipped with an auxiliary electric vacuum pump. Vacuum pump supplies vacuum to power booster ensuring adequate vacuum for proper vacuum assist. Vacuum pump is activated by vacuum sensor signal to ABS control module. Vacuum sensor is located in power booster vacuum line.