BMW X3 Service & Repair Manual: Removing/replacing knock sensors (N55)
Necessary preliminary tasks:
- Read out the fault memory of the DME control unit.
- Switch off ignition.
- Remove INTAKE PLENUM .
- Vehicles with the Bosch high pressure pump only :
Remove HIGH PRESSURE PUMP .
Unlock connector (1) and remove.
Feed out connector (1) behind feed line, remove FEED LINE if necessary.
Release screws on both knock sensors (1) and remove knock sensors (1).
Installation note:
Clean contact surface of knock sensors on engine block.
NOTE: Reassemble the vehicle.
Check stored error/fault messages.
Clear diagnostic fault entries from fault memory.
Removing/replacing knock sensors (N52T)
IMPORTANT:
Aluminum-magnesium materials.
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium cr ...
Replacing (dde) control unit (N47 D20 O1)
IMPORTANT:
Read and comply with NOTES on protection against electrostatic damage (ESD protection).
Necessary preliminary work:
Read out t ...
Other materials:
BMW X3 Service & Repair Manual > Electronic switching or control units: Replacing control unit (dme) (N55)
IMPORTANT:
Read and comply with notes on protection against electrostatic discharge (ESD protection).
Necessary preliminary tasks:
Switch off ignition.
Disconnect BATTERY NEGATIVE LEAD .
Remove INTAKE PLENUM .
IMPORTANT:
FOLLOW INSTRUCTIONS FOR REMOVING AND INSTALLING CONTRO ...