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:
Principle
The Steptronic transmission combines the functions
of an automatic transmission with the possibility
of manual shifting, if needed.
Safety information
Warning
An unsecured vehicle can begin to move and
possibly roll away. There is a risk of accident.
Before exiting, secure the vehicle aga
Pull lever forward to remove:
If necessary, lever out lower locking point (1) from rear with a
screwdriver.
Release screw (2).
If necessary, move seat fully forwards and upwards.
Fig. 4: Releasing Screw And Locking Point
Remove trim:
Unclip at top edge
Unclip at rear towards top side
Pull