34 00 025 Replacing fluid in brake system

WARNING: This page is about a different car, the 2011 BMW M3, 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: READ AND COMPLY WITH GENERAL INFORMATION.

IMPORTANT: When carrying out repairs to the brake system, follow the procedure set out in BLEEDING BRAKE SYSTEM WITH DSC .

Only use brake fluids that have been approved by BMW, see BRAKES - OPERATING FLUIDS

Unclip retaining tabs (1).

Pull cover (3) out of guide (2) and remove.

Fig 1: Identifying Retaining Tabs, Guide And Cover

Courtesy of BMW OF NORTH AMERICA, INC.

Connect brake fluid changer to expansion tank and switch on.

NOTE: Check relevant equipment manufacturer's operating instructions for each device.
Charging pressure should not exceed 2 bar.

Fig 2: Connecting Bleeder Unit To Expansion Tank

Courtesy of BMW OF NORTH AMERICA, INC.

Fully rinse the brake system

Connect bleeder hose with collecting tray to bleeder valve on rear right brake caliper.

Open bleeder valve and purge until clear, bubble-free brake fluid emerges.

Close vent valve.

Follow same procedure on rear left, front right and front left wheel brake.

Fig 3: Locating Bleeder Hose With Collecting Tray To Bleeder Valve On Rear Right Brake Caliper

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: The clutch slave cylinder must also be scavenged in vehicles with manual transmissions.

Switch off brake fluid changer and remove from expansion tank.

Check brake fluid level. If necessary, top up/draw off to max. level.

Close expansion tank.

NOTE: Pay attention to rubber seal (1) in sealing cap.

Fig 4: Identifying Rubber Seal On Sealing Cap

Courtesy of BMW OF NORTH AMERICA, INC.

After installation

Reset CBS in the vehicle according to factory specification.