Brake Fluid Pressure Sensor/Switch: Service and Repair

Removing and installing/replacing pressure sensor for DSC

Note: Before beginning work:
- Switch off ignition.
- Protect brake system against unauthorized actuation.
After completing work:
- Purge front axle circuit.
- Check pressure sensor under pressure for leaks.
- Pressure sensor check by DSC system: Turn on ignition and firmly depress brake pedal. Warning lamps must not come on any more.

M62: Remove equipment carrier.
M54: Remove intake filter housing.





Unlock plug connection and detach.
Release screw.

Installation:

- Bracket, Hydraulic unit to body 8 Nm





Press holder away in direction of arrow.
Detach pressure sensor with special tool 34 1 290.

Installation:
- Check sealing surfaces and thread of pressure sensor and of hydraulic unit for damage.
- Screw in a new pressure sensor immediately after unscrewing the old pressure sensor.
- Pressure Sensor to hydraulic unit 19 Nm
- Only with special tool 34 1 290