BMW X3 Service & Repair Manual: Replacing section of wiring harness for engine (N47D20 O1)

IMPORTANT: Read and comply with notes on protection against electrostatic damage ESD protection).

Necessary preliminary work:

• Read out the fault memory of the DDE control unit.
• Switch off ignition.
• Disconnect BATTERY EARTH LEAD .
• Remove INTAKE FILTER HOUSING .
• Remove INTAKE PORT .
• Remove rear acoustic cover.
• Remove sound insulation on injectors.
• Remove front UNDERBODY PROTECTION .

Release screws (1).

Detach coolant hose from cover of electronics box.

Remove electronics box cover (3).

Unlock all connectors (1) from control unit and disconnect.

Detach rubber grommets (2) from electronics box. Place wiring harnesses to the side.

Installation note:

Make sure grommets are correctly fitted (watertightness).

Pull out fasteners (1) in direction of arrow.

Push back sockets (2) and detach engine wiring harness from connector housing.

Release screw (1).

Release cable channel (2).

Release wiring harness from clips and clamps.

Feed out wiring harness and remove.

Installation note:

Check wiring harness installation arrangement.

Check plug connections for correct fit.

Check stored fault message.

Delete fault memory.