34 51 527 Removing and installing/replacing DSC hydraulic unit (2' Series coupe and convertible, 2017-2021)

Necessary preliminary work:

Refer to READING AND COMPLYING WITH GENERAL INFORMATION .
Refer to REMOVING SOUND INSULATION FIREWALL upper part, center.
Draw off brake fluid.

Only with F80, F82:

Remove tension strut on spring strut dome.

NOTE: Extract brake fluid out of expansion tank. Use a suction bottle used exclusively for drawing off brake fluid.
Do not reuse drawn out brake fluid.

After completing repair work:

Bleed BRAKING SYSTEM .
Brake line mix-up test:

IMPORTANT: Do not mix up brake lines.
If necessary, mark before removal.
Close off connecting bores with seal plugs.

IMPORTANT: Remove and/or loosen the following holders for better movement of brake lines!

Remove holder for brake lines (1).

Detach the brake lines (2) from the rubber grommet.

Courtesy of BMW OF NORTH AMERICA, INC.

Detach brake line (1) from holder.

Disconnect plug connection (2).

Unfasten brake lines (3).

Installation note:

Tightening torque 34 32 1AZ .

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (4) and feed out hydro aggregate in upward direction.

IMPORTANT: Brake lines must not be bent!

Installation note:

Tightening torque 34 51 5AZ .

When replacing hydraulic unit:

Release screws (1) and convert holder (2).

Installation note:

Tightening torque 34 51 4AZ .

Modify DSC CONTROL UNIT .

Courtesy of BMW OF NORTH AMERICA, INC.

When replacing control unit:

Carry out programming/encoding
Adjustment of steering angle sensor