Brake Master Cylinder, Removing And Installing: 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.

-- Remove the plenum chamber cover. Refer to PLENUM CHAMBER COVER, REMOVING AND INSTALLING .

-- Remove the brake fluid reservoir. Refer to BRAKE FLUID RESERVOIR, REMOVING AND INSTALLING .

-- Remove the plenum chamber bulkhead. Refer to OVERVIEW - BULKHEAD .

-- Disconnect the connector -3- for the Brake Lamp Switch -F-.

Courtesy of AUDI OF AMERICA, LLC

-- Remove the union bolts -2- for the brake lines and remove the brake lines from the brake master cylinder -1-.

CAUTION:

Do not let any brake fluid run into the brake booster.

NOTE:

Do not change the shape of the brake lines.

-- Immediately seal the open connection points with clean plugs from the Assembly Part Set :5Q0 698 311 .

-- Remove the nuts -arrows-.

Courtesy of AUDI OF AMERICA, LLC

CAUTION:

There is a risk of damaging the brake booster.

Do not let anything fall in the brake booster when removing the brake master cylinder.
The piston in the brake master cylinder is not secured.
The actuator pin for the brake lamp switch must not get lost.

-- Disconnect and remove the brake master cylinder from the brake booster.