2-Stage Airbag; Head Protection Airbags (Hps) - BMW 1999-2005 M3 Service Manual

Airbag System (SRS)
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2-stage airbag

Beginning in the 2000 model year
(9/1999 production) the front airbags
were changed to a 2-stage style airbag.
This ensures that the force of airbag
inflation is not greater than necessary to
provide protection. The airbags are
designed to provide "soft" deployment if
the acceleration sensor detects a
low-speed impact, with a "hard"
deployment only in higher speed
impacts.

Head protection airbags (HPS)

This protective system covers a large
area between the front roof pillar
(A-pillar) and the rear section of the roof.
A hollow flexible tube about 5 feet long
and 1.5 inches in diameter is anchored
inside the A-pillar and front roof rail and
concealed by interior trim.
- Passenger
airbag
- Head Protection
System (HPS)
airbag
- Front door
side-impact
airbag
- Rear door
side-impact
airbag (optional)
2/25/2009 11:21 PM