34 51 527 Removing and installing/replacing DSC hydraulic unit

WARNING: This page does not describe the selected car, but rather 31 other vehicles, including the 2015 BMW Alpina B7L, 2015 BMW Alpina B7, 2015 BMW 750i, 2015 BMW 750Li, and 2015 BMW 740i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary work:

Read and comply with GENERAL INFORMATION .
Remove front left rear WHEEL ARCH PANEL
Remove left UNDERBODY PANELLING

After completing repair work:

BLEED BRAKE SYSTEM

IMPORTANT:

Do not mix up brake lines.

If necessary, mark before removal.

Observe different versions with different lines.

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: Pressing Brake Pedal Down

G06890059

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 Foam Block, Open Cable Straps And Cable Straps

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 34 32 1AZ .

Fig 3: Identifying Square Head And Brake Lines

G06890061

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten brake lines (1).

Installation note:

Tightening torque 34 32 1AZ .

Fig 4: Identifying Brake Lines

G06890062

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection (1).

Unfasten screws (2).

Installation note:

Tightening torque 34 51 5AZ .

Remove hydraulic unit (3) towards bottom.

Fig 5: Identifying Plug Connection, Screws And Hydraulic Unit

G06890063

Courtesy of BMW OF NORTH AMERICA, INC.

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 34 32 1AZ .

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

Installation note:

Tightening torque 34 51 4AZ .

Fig 7: Identifying Brake Lines, Screws And Holder

G06890065

Courtesy of BMW OF NORTH AMERICA, INC.

When replacing control unit:

Carry out programming/encoding