Two-Stage Airbag (Mrs 111); Airbag Indicator Light - BMW 5251 Service Manual

I
Airbag System (SRS)
Two-stage airbag (MRS Ill)
Beginning with 2000 model year (911 999 production) the front
airbags were changed to a two-stage style airbag. This en-
sures that the force of airbag inflation is not greater than nec-
essary to provide protection. The airbags are designed to
Drovide "soit" de~lovment if the acceleration sensor detects a
iow-speed impact, and "hard deployment in higher speed im-
pacts.
NOTE-
A two-stage passenger airbag was used on cars built be-
tween 9/1998 and 3/1999. This pre-smart technology airbag
used two ignition stages. Stage one is designed to ignite first
during an impact. Stage two ignites after a timed period, as
programmed in the MRS I1 control module.
Airbag indicator light
The MRS control module detects and stores system status
The airbag indicator light in the instrument cluster displays
the status of the airbag system when the ignition key is in "ac-
cessory" or ON positions.
System normal: lndicator light comes on briefly, then goes
out.
-
System malfunction: lndicator light fails to come on.
System malfunction: lndicator light comes on briefly, goes
out and lights up again.
The airbag indicator light also comes on if the seat belt pyro-
technic tensioners have been triggered.