34 51 527 Removing and installing/replacing DSC hydraulic unit: Notes

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Necessary preliminary tasks:

Read and comply with GENERAL INFORMATION .
Remove front left rear WHEEL ARCH PANEL .
Remove left UNDERBODY PANELLING .
F12: Remove left V-strut.

After completing repair work:

BLEED BRAKE SYSTEM

IMPORTANT: Do not mix up brake lines.
If necessary, mark before removal.
Brake lines must not be bent.
Close off connecting bores with seal plugs.
Press brake pedal down to floor and secure with pedal support.

NOTE: The brake pedal may only be released when the brake lines are reconnected. This prevents brake fluid from emerging from the expansion tank when the brake lines are opened.

Fig 1: Locating Pedal Support

G04754178

Courtesy of BMW OF NORTH AMERICA, INC.

Cut open cable strap (1).

Replace cable straps.

Remove foam block (2).

Lever out penetration (3) and pull out towards front.

Fig 2: Identifying Parking Brake Cable Strap, Foam Block And Penetration

G06890060

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not bend brake lines.

Grip at square head (1) and release brake lines (2).

Tightening torque: see 1AZ in 34 32 BRAKE LINES .

Fig 3: Identifying Square Head And Brake Lines

G06890061

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten brake lines (1).

Installation note:

Tightening torque: see 1AZ in 34 32 BRAKE LINES .

Fig 4: Identifying Brake Lines

G06890062

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection (1).

Unfasten screws (2).

Installation note:

Tightening torque: see 5AZ in 34 51 SLIP CONTROL SYSTEM (DSC) .

Fig 5: Identifying Plug Connection, Screws And Hydraulic Unit

G06890063

Courtesy of BMW OF NORTH AMERICA, INC.

Remove hydraulic unit (3) towards bottom.

Replacement:

Unclip brake lines (1) from holder (2).

Fig 6: Identifying Brake Lines And Holder

G06890064

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten brake lines (1).

Installation note:

Tightening torque: see 1AZ in 34 32 BRAKE LINES .

Unfasten screws (2). Take off holder (3).

Installation note:

Tightening torque: see 4AZ in 34 51 SLIP CONTROL SYSTEM (DSC) .

Fig 7: Identifying Brake Lines, Screws And Holder

G06890065

Courtesy of BMW OF NORTH AMERICA, INC.