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
xDrive is the all-wheel-drive system of the vehicle.
Concerted action by the xDrive and and
other suspension control systems, such as Dynamic Stability Control (DSC),
further optimizes
traction and driving dynamics.
General information
xDrive variably distributes the driving power to
the
NOTE: Examples of unlocking and disconnecting different plug
connections.
Press lock and open clip in direction of arrow.
Disconnect plug connection.
Fig. 4: Pressing Lock
Press lock and open clip in direction of arrow.
Disconnect plug connection.
Fig. 5: Opening Clip
Open clip in direction of a