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:
ADJUSTING DOOR
CAUTION: Do not damage adjoining body parts.
Minor corrections (realignment work) are permitted if the existing
adjustment options are not sufficient.
NOTE: Observe gap dimensions.
The door must be provided with all attachment parts for correct adjustment.
Adjust screwed body parts
CAUTION: To avoid damage when handling optical fibers, comply with the
following
points:
The minimum permitted bending radius is 25 mm
Do not subject optical fibers to compressive and tensile load
Protect optical fibers against the effects of heat > or =85ºC
(e.g.
during welding work, dr