Brake Master Cylinder, Removing And Installing: Removing

WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 2016 Audi S4, 2016 Audi A4 Quattro, 2016 Audi A4, 2015 Audi S4, and 2015 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Removing

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

-- Remove the engine cover.

-- Remove the tower brace. Refer to TOWER BRACE, REMOVING AND INSTALLING .

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

-- To protect against escaping brake fluid, place enough lint-free cloths in the area below the master brake cylinder.

-- Extract as much brake fluid as possible from the brake fluid reservoir with the Brake Charger/Bleeder Unit VAS5234.

WARNING:

Brake fluid must never come into contact with fluids containing mineral oils (oil, gas, cleaning solutions). Mineral oil damages the plugs and sleeves in the brake system.
Brake fluid is poisonous. NEVER siphon brake fluid with your mouth! Also due to its corrosive effect, brake fluid must not come into contact with paintwork.
Observe the disposal regulations.

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

-- Disconnect the brake lines -2- at brake master cylinder and seal the brake lines with plugs from the repair kit.

Fig 1: Brake Booster Bolts, Brake Lines & Brake Master Cylinder Bolts

Courtesy of AUDI OF AMERICA, LLC

-- Remove the brake master cylinder nuts -3-.

-- Remove brake master cylinder from brake booster.

-- Remove the brake master cylinder from the vehicle.

CAUTION:

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