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34 32 881 Replacing front left or right brake hose

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Necessary preliminary tasks: 

After completing repair work: Bleed braking system. See REPLACING FLUID IN BRAKE SYSTEM  or REPLACING FLUID IN BRAKE SYSTEM (M6) .

Press brake pedal down to floor and secure with pedal support.

NOTE: The pedal support may only be released when the brake lines are reconnected.
This prevents brake fluid from emerging from the expansion tank and air from entering the system when the brake lines are opened.
Fig 1: Securing Brake Pedal With Pedal Support
G04754178Courtesy of BMW OF NORTH AMERICA, INC.

Detach brake hose (1) from brake caliper.

If necessary, grip at knurling (2).

Installation note: 

Tightening torque 34 32 2AZ .

Fig 2: Identifying Retaining Screw And Knurling
G06889955Courtesy of BMW OF NORTH AMERICA, INC.

Release retaining screw (1). If necessary, grip at square head.

Installation note: 

Position guides (3) correctly in holder (4).

Tightening torque 34 32 1AZ .

Fig 3: Identifying Holder, Guides And Retaining Screw
G06890010Courtesy of BMW OF NORTH AMERICA, INC.

Release brake hose from holders (1).

IMPORTANT: Observe assembly sequence:
  1. Fasten brake hose in holders (1).
  2. Move wheels into straight-ahead position.
  3. Fasten brake hose at pipe/brake hose connection.
  4. Fasten brake hose at brake caliper.

Never twist brake hose when installing it and avoid all contact with parts attached rigidly to the body.
Fig 4: Identifying Brake Hose Holders
G06890011Courtesy of BMW OF NORTH AMERICA, INC.