34 41 135 Removing And Installing Or Replacing Both Bowden Cables For Parking Brake

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IMPORTANT: Read and comply with General Information. Refer to 34 00 ... GENERAL INFORMATION . With mechanical emergency release of actuating unit, max. torque at end stop 5 N.m. Bowden cables may only be replaced in pairs.

Observe safety instructions on raising the vehicle. Refer to 00..... LIFTING VEHICLE WITH A LIFTING PLATFORM .

Necessary Preliminary Tasks:

Remove both rear wheels. Refer to 36 10 300 REMOVING OR INSTALLING FRONT OR REAR WHEEL .
Remove brake discs. Refer to 34 21 320 REMOVING AND INSTALLING OR REPLACING BOTH REAR BRAKE DISCS .
Disconnect parking brake Bowden cables from wheel brake.
Unscrew holder for Bowden cables from body.
Remove luggage compartment floor trim panel. Refer to 51 47 101 REMOVING AND INSTALLING/REPLACING LUGGAGE COMPARTMENT FLOOR TRIM PANEL .
E67:
Remove starter battery.

Release screws on parking brake housing cover and remove housing cover.

Fig 1: Locating Screws On Parking Brake Housing Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Tightening torque, refer to 34 41 2AZ in BRAKES - TIGHTENING TORQUES .

Release parking brake to just before end stop with emergency release tool (1) from on-board tool kit.

Fig 2: Identifying Emergency Release Tool

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Raise end stop (1) with screwdriver.

Continue releasing parking brake with emergency release tool until assembly position is reached (cable pulleys rest on outer housing walls (2)).

Fig 3: Raising End Stop With Screwdriver

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten gasket (1) and pull out of housing a little.

Press on tabs (2) with screwdriver in order to unlock Bowden cables.

Pull Bowden cable mountings out of parking brake housing a little.

Unhook Bowden cables from cable pulleys (3).

Remove Bowden cables from below.

Fig 4: Identifying Gasket, Tabs And Bowden Mounting

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Installation:

Tabs of seal (1) must engage in parking brake mounting tray. End sleeves of Bowden cables must engage in parking brake housing.

Fig 5: Locating Seal Tabs

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Installation:

Ensure flush mounting between seal and housing.

To facilitate installation, use silicone spray as antiseize agent.

Fig 6: Identifying Flush Mounting Between Seal And Housing

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IMPORTANT: After installing Bowden cables.

Vehicle at standstill.
Ignition turned on.
Touch parking brake button three times at intervals of 5 seconds.
Carry out brake test on brake analyzer.
- Drive car with rear axle only onto dynamic brake analyzer.
- Engine off.
- Touch parking brake button and ensure uniform increase.