Brake Caliper Piston, Removing And Installing, Six-Piston Brake: Installing

WARNING: This page is about a different car, the 2021 Audi S4 and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Install the entire repair kit.
Only use mineral spirits to clean the brakes.
When a brake caliper piston or a piston cylinder are damaged, the brake caliper must be replaced.

-- Clean the surface of the brake caliper piston only with mineral spirits and let it dry.

-- Insert the seal into the brake caliper.

-- Install protective cap on piston.

Fig 1: Identifying Protective Cap On Piston

Courtesy of AUDI OF AMERICA, LLC

-- Without tilting it, push the brake caliper pistons using constant pressure.

Fig 2: Pushing Piston Into Brake Caliper Housing

Courtesy of AUDI OF AMERICA, LLC

-- Press the protective cap into the groove on the brake caliper.

The protective cap must fit tightly in the groove. If necessary, push down on it slightly with the Piston Resetting Tool -T10145-.

-- Repeat the work procedure on the next brake caliper piston.