BMW X3 Service & Repair Manual: Removing and installing/replacing vent valve for brake caliper

Necessary preliminary work:

• Raise vehicle.

Removal:

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.

Remove dust cap (1).

Remove vent valve (1).

IMPORTANT: Collect escaping brake fluid in a suitable collecting vessel.

Installation:

IMPORTANT: The bore hole must be free of contamination!

Install vent valve (1).

Mount dust cap (1).

Remove pedal support.

Required follow-up work:

• Bleed brake system.