Master Cylinder

Special tools and workshop equipment required

Hose clamps 3094
Torque wrench V.A.G 1331
Brake filler/bleeder unit V.A.G 1869
Brake filler/bleeder unit suction adapter V.A.G 1869/4
Brake filler/bleeder unit VAS 5234

Removing

-- Note or request radio code on vehicles with coded radio if necessary.

-- Disconnect battery. Refer to [For transmission(s) 0A4, 02E, 09G, 02Q] [For engine(s) BRM, BGP, BPY, BGQ, CBTA, CBEA, CJAA, CBUA, CCTA, CBFA] Removal and Installation .

Diesel Vehicles

-- Disconnect connection -1- and remove rear spring hose clamp from intake hose.

Fig 1: Locating Electrical Connection And Spring Clamp

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Remove spring hose clamp -arrow- and remove hose from air filter housing.

Fig 2: Identifying Spring Hose Clamp

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Remove bolt from air filter housing -arrow-.

Fig 3: Identifying Air Filter Housing Bolt

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-- Move air filter housing upward out of brackets and remove.

Continuation for All Vehicles

-- Remove battery. Refer to [For transmission(s) 0A4, 02E, 09G, 02Q] [For engine(s) BRM, BGP, BPY, BGQ, CBTA, CBEA, CJAA, CBUA, CCTA, CBFA] Removal and Installation .

-- Remove the battery carrier.

-- Place sufficient lint-free cloths in the area of the engine and transmission.

-- Extract as much brake fluid as possible from brake fluid reservoir using VAS 5234 or V.A.G 1869/4.

With Manual Transmission

-- Disconnect clutch master cylinder supply hose -B- with 3094.

-- Pull off supply hose -B- for clutch master cylinder.

Fig 4: Identifying Clutch Master Cylinder And Supply Hose

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Continuation for All Vehicles

-- Disconnect connector -A- from floating warning indicator sensor.

Vehicles with the Brake Light Switch -F- on the Master Brake Cylinder

-- Disconnect the connector -1- from brake light switch.

Fig 5: Identifying Removal Of Brake Light Switch F From KW 45/05

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Continuation for All Vehicles

-- Remove brake fluid reservoir, press the engagement straps toward outside at reservoir and simultaneously pull brake fluid reservoir out of sealing plugs.

Fig 6: Identifying Brake Master Cylinder, Brake Lines And Nuts

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Remove the brake lines -1- on master brake cylinder, seal brake lines using Sealing plugs 1H0 698 311 A.

-- Remove the nuts -2- from master brake cylinder.

-- If present, remove heat shield.

-- Carefully take brake master cylinder out of brake booster.

Installing

-- Installation is performed in the reverse sequence.

Observe the following points when installing:

-- When installing together the brake master cylinder and brake booster, make sure that the push rod is correctly located in the brake master cylinder.

-- Connect the battery. Refer to [For transmission(s) 0A4, 02E, 09G, 02Q] [For engine(s) BRM, BGP, BPY, BGQ, CBTA, CBEA, CJAA, CBUA, CCTA, CBFA] Removal and Installation .

-- Bleed brake system. Refer to BRAKE SYSTEM, BLEEDING WITH BRAKE FILLER/BLEEDER UNIT VAS 5234 OR VAG 1869 .

Tightening Specifications

Component	Tightening Specifications
Master brake cylinder at brake booster Use new nuts!	25 Nm
Brake lines to master brake cylinder	14 Nm
Battery holder to body	20 Nm