Master Brake Cylinder: Removing

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Special tools and workshop equipment required

Torque Wrench 5-50 Nm V.A.G 1331
Adapter VAS 5234/1
Brake Charger/Bleeder Unit VAS 5234
Sealing Plugs Repair Kit, Part no. 1H0 698 311 A

-- 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, refer to PLENUM CHAMBER COVER, REMOVING AND INSTALLING .

-- 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 VAS 5234.

WARNING:

Brake fluid must never come into contact with fluids containing mineral oils (oil, gas, cleaning solutions). Mineral oil damages the sealing plugs and boots of 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 disposal regulations.

-- Remove the brake fluid reservoir, refer to BRAKE FLUID RESERVOIR .

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

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

Courtesy of AUDI OF AMERICA, LLC

-- Remove 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.