13 62 531 Replacing coolant-temperature sensor (M62)

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 BMW 540i, 2002 BMW 540i, 2001 BMW 540i, 2000 BMW 540i, and 1999 BMW 540i. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: After completing work, fill and vent cooling system and check for leaks, refer to 17 00 039 BLEEDING COOLING SYSTEM AND CHECKING FOR WATER LEAKS .
Coolant, refer to OPERATING FLUIDS - RADIATOR .
Interrogate fault memory of DME control unit. Switch off ignition.

Cars with idle-speed control valves only:

Unfasten plug connection (1).

Installation

Top up coolant.

Unscrew and remove double temperature sensor (1) for Digital Motor Electronics (DME) and remove coolant indicator.

Tightening Torque, refer to SENSOR FOR CONTROL UNIT in FUEL SYSTEM - TIGHTENING TORQUES - 540i.

Fig 1: Locating Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Cars without idle-speed control valves only:

Sensor is fitted on water pipe at front.

Disconnect vacuum lines (1).

Detach plug from sensor (2).

Fig 2: Identifying Vacuum Lines And Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew sensor (2).

Tightening Torque, refer to SENSOR FOR CONTROL UNIT in FUEL SYSTEM - TIGHTENING TORQUES - 540i.

Installation

Replace sealing ring.

Fig 3: Replacing Sealing Ring

Courtesy of BMW OF NORTH AMERICA, INC.

All cars:

Interrogate fault memory of DME control unit, check faults in memory then cancel fault memory.