Necessary preliminary tasks:
Unlock connector (1) and remove.
Release bolt (2) on knock sensor.
Remove knock sensor for 3rd and 4th cylinders.
Installation note:
Clean contact surface of knock sensor on engine block.
NOTE: Reassemble the vehicle.
Check stored fault message.
Delete fault memory.
BMW X3 Owners Manual > Front-end collision warning
with braking function: System limits
Detection range
The system's detection potential is limited.
Thus a warning might not be issued or be issued
late.
E. g. the following situations may not be detected:
Slow moving vehicles when you approach
them at high speed.
Vehicles that suddenly swerve in front of
you, or sharpl ...