34 33 000 Removing and installing/replacing brake booster (brake booster) (Countryman 2017-2023, except PHEV)

Preliminary work needed  :

• Read and comply with General Information.
• Remove the TANDEM BRAKE MASTER CYLINDER .
• Remove CONSOLE FOR WINDSHIELD WIPER SYSTEM .

Removal  :

Remove screws (1) and remove footwell air duct (2).

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Detach retaining clip (1) from brake pedal, disengage and pull out retaining bolt (2).

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Unscrew nuts (1).

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Pull return check valve (1) in arrow direction out of brake booster.

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Carefully pull brake booster (1) out of bulkhead and tilt out in upward direction.

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Installation  :

Carefully insert brake booster (1) into bulkhead.

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Installation note  :

Replace seal for vacuum line/check valve (1) in brake booster! 

Install check valve (1) in arrow direction into brake booster.

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Insert nuts (1) and tighten.

Replace self-locking nuts.

Parts:  Self-locking nuts.

Tightening torque 34 33 1AZ .

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Grease retaining bolt (1) with lubricating grease NBU 12K (part number: 83 23 9 407 810  ).

Install retaining bolt (1) through brake pedal.

Mount retaining clip (2) on retaining bolt.

Replace retaining clip (2).

Parts:  Retaining clip

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Install footwell air duct (2).

Insert screws (1) and tighten.

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Required follow-up work 

• Install tandem brake master cylinder.
• Install CONSOLE FOR WINDSHIELD WIPER SYSTEM .