BMW X3 Service & Repair Manual > Engine wiring loom: 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 ...