34 00 025 Replacing fluid in ABS/ASC+T brake system: Notes

WARNING: High-voltage system - danger to life!

WARNING: Compliance with the following points is mandatory before beginning work:

Necessary preliminary tasks:

REMOVE LEFT MICROFILTER HOUSING COVER
READ AND COMPLY WITH GENERAL NOTES.
The capacities are oil change quantities. See BMW Electronics Parts Catalogue/Commercial Service Data (ETK/KSD) (capacities)

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

Use only BMW-approved brake fluids, see APPROVED BRAKE FLUID .

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: Connect 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 Bleeder Valve On Rear Right Brake Caliper

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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 MAX Level

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