BMW X5: Brake Lines

OVERVIEW OF BRAKE LINES

1. Brake hose, front.

2. Brake tubes.

3. Brake hose, rear, to body.

4. Brake hose, rear, to wheel brake cylinder.

REPLACING ALL BRAKE PIPES

Special tools required:

• 34 5 100

NOTE: The brake lines are only supplied in the straight version and correct length with connecting nipple.

Read and comply with General Information. After completing work, bleed brake system. Observe safety instructions on raising the vehicle.

New brake lines are bent into shape with bending tool 34 5 100.

Removed brake pipes can be used as templates for bending.

IMPORTANT:

• Protective coating of brake line must not be damaged during bending.
• Do not kink or bend back brake lines.
• Watch distances to rigid and movable vehicle parts. Brake lines may not make contact or rub.
• Tighten down brake line couplings with torque wrench.

Installation:

Tightening torque 34 32 1AZ.

REPLACING FRONT LEFT OR RIGHT BRAKE HOSES

Necessary preliminary tasks:

• Remove wheel.
• Read and comply with General Information.

After completing tasks, bleed brake system.

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

Fig. 68: Locating Brake Pedal Knob

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 retainer (1) from bracket on spring strut in upward direction.

Installation:

Retainer (1) must be felt and heard to snap into place.

Ensure correct seating in guide.

Fig. 69: Detaching Retainer From Bracket On Spring Strut

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

Disconnect brake hose from brake line (1).

Installation:

Tightening torque 34 32 1AZ.

Fig. 70: Identifying Brake Hose And Brake Hose Square Head

Detach brake hose from brake caliper (1).

Installation:

Tightening torque 34 32 2AZ.

Fig. 71: Identifying Brake Caliper

IMPORTANT: First tighten brake hose on brake caliper.

Move wheels into straight-ahead position.

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 (BETWEEN REAR AXLE CARRIER AND BODY)

Special tools required:

• 34 3 170.

NOTE: Read and comply with General Information.

After completing work: Bleed braking system Press clutch 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 drive to prevent connecting piece from turning in retaining bracket. Never twist brake hose (2) when installing it and avoid all contact with parts attached rigidly to the body.

Disconnect brake hose (2) from brake line (1).

Detach brake hose from brake line (3) and remove brake hose (2).

Installation:

Tightening torque 34 32 1AZ.

Installation:

Use torque wrench (Hazet 6282-1CT with reversible ratchet head).

Tighten brake line using torque wrench (1) and special tool 34 3 170.

REPLACING REAR LEFT OR RIGHT BRAKE HOSES

NOTE: Read and comply with General Information.

After completing takes, bleed brake system.

Apply pedal prop and depress brake pedal slightly. This prevents brake fluid from emerging from the expansion tank and air from entering the system when the brake lines are opened.

Fig. 72: Locating Brake Pedal Knob

Detach retaining clip (1) in direction of arrow.

Installation:

Retaining clip must be felt and heard to snap into place.

IMPORTANT: Grip brake hose at square head (3) to prevent connecting piece from turning in retaining bracket.

Detach brake hose from brake line (2).

Installation:

Tightening torque 34 32 1AZ.

Fig. 73: Detaching Retaining Clip

Detach brake hose from brake caliper (1).

Installation:

Tightening torque 34 32 3AZ.

Fig. 74: Identifying Brake Hose

Insert brake hose in bracket and screw onto brake pipe.

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

NOTE: First tighten brake hose on brake caliper.

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