Yes. The car battery. If the system looses all power the air bag light will be
on until reset.
Sounds like your is a fault with the air bag and will probably require repair.
you might ask if it is covered with the longer air bag safety warranty.
fwiw, the airbag indicator did not light up when I replaced the battery on my
'00 B5 S4. Nor did it light up when the service department disconnected the
battery when they had to remove a door and didn't want the lock pump to run
'00 s4 6spd
I based that on a number of posts that I read on AudiWorld !4 forum but not on
my own experience.
When a battery is disconnected to reset the system it is usually suggested to
leave it disconnected for a number of minutes. That is probably done to drain
off power from capacitors in the system so disconnecting briefly might not cause
A tool is available from parts stores to use when batteries are being changed
which consists of a plug for the lighter that has a nine volt battery to
maintain the electrical continuity when the main battery is disconnected.
I think some disconnect the battery AND touch both the neg and positive
cables together to remove any residual charges in the system. TRY THIS AT
YOUR OWN RISK!
I believe that water can really mess with connectors, so I would also
examine the connectors well.
BTW the ross-tech.com tool, along with the most recent software, might be
more specific with their scans/dtcs.
(One out of many daves)
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