BMW X5: Ignition Wires, Spark
REPLACING ALL SPARK PLUGS (N42, N40, N46, N45, N52, N52K, N51)
Special tools required:
Necessary preliminary tasks:
- Switch off ignition
- Remove ignition coils.
Unscrew spark plugs with special tool 12 1 171.
Installation:
Tighten down spark plugs with special tool 12 1 171and special tool 12 1 200
(torque limiter).
Without special tool 12 1 200, observe tightening torque.
Tightening torque 12 12 1AZ0.

Fig. 1: Identifying Special Tool (12 1 171) And (12 1 172)
READ NEXT:
NOTES ON CHECKING IGNITION SYSTEM
Troubleshooting -> Fault in fuel injection system
-> Spark plug faults
-> Ignition coil faults
-> Further fault patterns with evaluation
-> Additional
IMPORTANT: Read and comply with notes on protection against
electrostatic damage (ESD
protection).
IMPORTANT: Aluminum-magnesium materials.
No steel screws/bolts may be used due to the threat of ele
SEE MORE:
REPLACING VOLTAGE REGULATOR
Necessary preliminary tasks:
Switch off ignition.
Disconnect battery negative lead.
Notes on removing and installing electronic control units.
Remove alternator.
Bosch:
Release protective caps (1).
Fig. 40: Inserting Screwdriver Between Cover And Threaded Pin
Bos
Necessary preliminary tasks:
Remove glass slide/tilt sunroof.
Remove drive.
Release screws in marked area.
Tightening torque: 54 12 03AZ.
Remove crossmember (1).
If necessary, release fabric adhesive tape and replace.
Installation:
Pitch cables must be correctly located in guide
Fig. 37: Id