Front airbags help protect the driver and front passenger by responding to frontal impacts in which safety belts alone would not provide adequate restraint.
Side airbags
In a lateral impact, the side airbag supports the side of the body in the chest and lap area.
Head airbags
In a lateral impact, the head airbag supports the head.
Knee airbag
The knee airbag supports the legs in a frontal impact.
BMW X3 Service & Repair Manual > Body repair instructions: Straightening aluminum components in structure
Reshaping or heating extruded profiles and cast parts is not permitted!
Failure to comply with this requirement would have the following results:
In the case of reshaping, weld seams (E52) or bonded connections (E60, E61, E63, E64) tear in the
surrounding area.
In the case of reshaping ...