BMW X3 Service & Repair Manual: 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 crankcase requires aluminum screws/bolts exclusively.
Aluminum screws/bolts must be replaced each time they are released .
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification: Aluminum screws/bolts are not magnetic .
Jointing torque and angle of rotation must be observed without fail (risk of damage) .
Necessary preliminary work:
- Read out the fault memory of the DME control unit.
- Switch off ignition.
- Remove INTAKE PLENUM .
Unlock connector (1) and remove.
Release screws on both knock sensors (1) and remove knock sensors (1).
Installation note:
Replace aluminum screws.
Installation note:
Clean contact surface of knock sensors on engine block.
NOTE: Check stored fault messages.
Clear diagnostic fault entries from fault memory.
Removing/replacing knock sensor (3rd and 4th cylinder) (N20, N26)
Necessary preliminary tasks:
Read out the fault memory of the DME control unit.
Switch off ignition.
Remove STARTER MOTOR.
Unlock connector ...
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 th ...
Other materials:
BMW X3 Service & Repair Manual > Heater with operation: Removing and installing/replacing actuator drive for central kinematics (a/c
control)
IMPORTANT:
Servomotors must be readdressed in the event of replacement!
Addressing can only be carried out with the BMW diagnosis system.
Service functions:
Body
Heating and air conditioning function
Flap motors
Readdress flap motors
Necessary preliminary work:
Re ...