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Home >> Audi >> 2020 >> S4 Prestige >> Repair and Diagnosis >> External Pages >> Different car >> Section 36 (Hydraulic Components (Brake System) (2 Of 2)) >> 47 Hydraulic Components >> Rear Brake Caliper >> Brake Caliper Piston, Removing And Installing, Rear Brakes >> Removing

Brake Caliper Piston, Removing And Installing, Rear Brakes: Removing

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.
GWWN47-10252Courtesy of AUDI OF AMERICA, LLC
NOTE:

Install the entire repair kit when servicing.

Only use mineral spirits to clean the brakes.

Thinly coat the brake cylinder, brake caliper piston and seal with Lithium Grease :G 052 150 A2  .

-- Using an 8 mm internal multi-point socket, turn the spindle counter-clockwise in the direction of -arrow-. As a result, the thrust nut pushes the brake caliper piston out of the brake caliper.

Fig 1: Identifying Spindle Rotated Using A Torx Insert T45
GWWN47-10054Courtesy of AUDI OF AMERICA, LLC

-- Carefully remove the protective cap -1- and the seal out of the brake caliper with the :VAS40338  -2- using gentle lever movements, and do not damage the groove for the protective cap in the brake caliper while doing so.

Fig 2: Prying The Protective Caps
GWWA00-11206Courtesy of AUDI OF AMERICA, LLC

-- Clean the surfaces on the brake caliper piston and gasket only with mineral spirits and then dry.