The Fifth generation of the BMW 3-Series is what is currently on the road with a model run from 2005-2011. The Six Generation is due out in 2012.
The B-pillars are reinforced with a tubular structure throughout the B-pillars for added strength. The tubular reinforcement is made of ultra-strong steel which is formed from hot steel and then heat-treated while still in the mold. Something to take note of is the cross section of reinforcement tube is variably contoured based on the space available. Together with the crash box tailored to the loads, which act on the body, this ensures maximum safety. The bulkhead support is made of multi-phase steel . The strength of the side structure is maximized with the doors, the reinforced b-pillars, the seat structure and the instrument panel between the A-pillars.
Other Safety features:
- Front and rear head airbags
- Dual front side-mounted airbags
- Passenger airbag occupant sensing deactivation
- Front and rear seatbelt pretensioners
- Post-collision safety system