2011 BMW 3-Series Body Structure

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.

2011 BMW 3-Series Body Structure

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

2011 BMW 3-Series AirBag Locations

About Smitty


  1. Well it certainly looks very sturdy and safe.

  2. I had an E92 – 3 Coupe. I was driving my car and was a victim in a head on collision at a speed of 60MPH. The car which hit me came over the brow of a hill and was travelling at 80MPH+. I am still here and the occupants of the other car are not. After several months in hospital, it is very interesting to read about how intelligent the design of these cars is. It saved my life.