34 00 027 Replacing fluid in brake system

WARNING: This page is about a different car, the 2016 BMW Z4, 2015 BMW Z4, and 2014 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Read and comply with GENERAL INFORMATION . The capacities are oil change quantities.

IMPORTANT:

When carrying out repairs to the master brake cylinder or hydraulic unit, follow the procedure set out in BLEEDING BRAKE SYSTEM WITH DSC .

Under certain circumstances it is not possible after the brake system is opened to bleed the brake system fully at the rear EMF brake calipers. If there is still residual air in the rear brake calipers after normal bleeding, it will be necessary to work through an ADDITIONAL BLEEDING PROCEDURE !

Use only BMW-approved brake fluids, see OPERATING FLUIDS .

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 1: Connecting Brake Fluid Changer To Expansion Tank

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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 2: Locating Rear Right Brake Caliper Bleeder Valve

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 3: Locating Brake Fluid Level Mark (MAX)

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After installation:

Reset CBS display according to factory specification