BMW X3 (F25) Service & Repair Manual: Brake lines

OVERVIEW OF BRAKE LINES

• Replacing front left or right brake hose
• Replacing rear left or right brake hose

Replacing front left or right brake hose

Necessary preliminary tasks:

• Remove WHEEL .
• Read and comply with GENERAL INFORMATION.

After completing repair work: BLEED BRAKING SYSTEM.

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.

Detach brake hose (1) from brake caliper.

If necessary, grip at knurling (2).

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

Installation note: Position guides (3) correctly in holder (4).

Release brake hose from holders (1).

Unscrew holder (2).

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.

Replacing rear left or right brake hose

NOTE: Read and comply with GENERAL INFORMATION.

After completing repair work: BLEED BRAKING SYSTEM

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.

IMPORTANT: Grip brake hose at square head (2) so that connecting piece cannot rotate in retaining bracket.

Disconnect brake hose from brake line (1).

Detach brake hose (1) from brake caliper.

Installation note: First tighten brake hose on brake caliper.

IMPORTANT: Never twist brake hose when installing it and avoid all contact with components attached rigidly to the body.