Emptying expansion tank
WARNING: This page is about a different car, the 2025 BMW M4, 2024 BMW M4, 2023 BMW M4, 2022 BMW M4, and 2021 BMW M4. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
TECHNICAL INFORMATION
Before first working on the DSCi brake (integrated brake), the "DSCi" web-based training must be passed successfully.
The "DSCi" web-based training is started in the Learning Management System (TMSi).
Before first working on the DSCi brake (integrated brake), the "DSCi" web-based training must be passed successfully.
The "DSCi" web-based training is started in the Learning Management System (TMSi).
NOTE:
TECHNICAL INFORMATION
Use only BMW-approved brake fluids.
Use only BMW-approved brake fluids.
Preliminary work
- Refer to CARRYING OUT THE BRAKE FLUID CHANGE SERVICE FUNCTION .
- Refer to REMOVING THE COVER OF THE ENGINE COMPARTMENT AT THE REAR LEFT .
- Open sealing cap (1).
- Start the brake fluid change service function.
- Work through the instructions in the service function in sequence .
- Connect the vent hose with the collecting vessel to the bleed valve (1) on rear right brake caliper.
- Open bleed valve (1).
- Brake fluid leaks out until the lowest level of the brake fluid level sensor in the expansion tank has been reached.
- Close bleed valve.TIGHTENING TORQUE SPECIFICATIONS
Rear bleed valve Bleed valve tightening torque 10 Nm