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:
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.
BMW X3 Owners Manual > Maintenance: Condition Based Service
CBS
Sensors and special algorithms take into account
the driving conditions of your vehicle.
Based on this, Condition Based Service recognizes
the maintenance requirements.
The system makes it possible to adapt the
amount of maintenance corresponding to your
user profile.
Detailed informati ...