BMW X3 Owners Manual: Maintenance
The battery is maintenance-free.
The added amount of acid is sufficient for the service life of the battery.
Further information about the battery can be obtained from your service center.
Battery replacement
Use approved vehicle batteries only
Only use vehicle batteries that have been approved for your vehicle by the manufacturer; otherwise, the vehicle could be damaged and systems or functions may not be fully available.
After a battery replacement, have the battery registered on the vehicle by the service center to ensure that all comfort features are fully available and that any Check Control messages of these comfort features are no longer displayed.
Vehicle battery
...
Charging the battery
General information
Make sure that the battery is always sufficiently
charged to guarantee that the battery
remains usable for its full service lif ...
Other materials:
BMW X3 Service & Repair Manual > Front axle: Bolt
Bolt AM
Replaced by: 83300492053
NOTE: Replaced by 32 3 090. (0 492 053)
Bolt Mechanical tool
NOTE:
(drive pin) For radial gears in the front axle differential for checking the
coefficient of friction
BRIDGE
Bridge Minimum set: Mechanical tools AM
NOTE: (Support bridge) All-wheel drive ...