Replacing Wiring Harness Section for Ignition Coil

12 51 100 - Replacing wiring harness section for ignition coil (N52)





Important!
Read and comply with notes on protection against electrostatic damage (ESD protection) 61 35 ... Notes on ESD Protection (Electro Static Discharge).





Necessary preliminary tasks:
- Read out fault memory of DME control unit
- Switch off ignition
- Follow instructions for disconnecting and connecting battery 13 3 010 Hose Clip
Disconnect battery negative lead from battery and lay to one side
- Remove fresh air duct Service and Repair
- Remove acoustic cover 11 00 ... Removing and Installing/Replacing Acoustic Cover
- E65: Remove center of assembly compartment bulkhead.





Only: E60, E61, E63, E64
Unlock cover (1) with slide (3).
Unfasten screws (2).
Remove electronics box cover (1).





Only: E65
Release screw and remove holder (1).
Release screws and remove cover (2) from electronics box.
Release screws on seal (3).





Unlock plug on control unit and disconnect.
Unlock tab (1), pull contact carrier (2) in direction of arrow out of housing.
Unlock and disconnect all plug connections of ignition coil wiring harness section in electronics box.





Release screws and remove holder (1).
Tightening torque 12 52 1AZ [1][2]Power and Ground Distribution.





Release screws and remove cable duct (1).

Installation Note:
Replace aluminium screws.
Tightening torque 12 52 2AZ [1][2]Power and Ground Distribution.









Note:
Check stored fault messages.
Now clear the fault memory.