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Power Booster Push Rod

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.
NOTE: Audi refers to power booster push rod as ball head adjustment.

Measure push rod length whenever power booster or master cylinder is replaced. Push rod length is measured from master cylinder mounting flange to end of ball head. When measuring, ball head must be at a right angle to surface of the brake booster. Measure to end of ball head without seal. Measure distance "A". See Fig 1. Adjust push rod length if not as specified. See POWER BOOSTER PUSH ROD LENGTH  table.

POWER BOOSTER PUSH ROD LENGTH

Application Specification Inches (mm)
A6, Allroad, RS6 & S6
Left Hand Drive 6.24-6.28 (158.5-159.5)
Right Hand Drive 6.80-6.83 (172.7-173.7)
Fig 1: Adjusting Power Booster Push Rod Length
G00178840Courtesy of AUDI OF AMERICA, INC.