Replacing Wiring Harness Section For Ignition Coils

Replacing Wiring Harness Section For Ignition Coils (M54)

Interrogate fault memory of DME control unit.
Switch off ignition.
Follow instructions for disconnecting and connecting battery.
Disconnect battery negative lead from battery.

E46 and Z3 only:


NOTE: Shown on the E46. The same procedure applies to the Z3.


Pull off sealing strip (1).
Remove cable (3) together with profile seal (2) from partition wall towards top.

Installation:
To prevent leaks, you must install profile seal (2) correctly.







Z3, E46, E53 and E39:


NOTE:
Interrogate fault memory of DME control unit.
Check stored fault messages.
Rectify faults.
Then clear fault memory.