Hey Everyone,

I've owned my B6 S4 Avant for about a year and a half now, and just a couple of months ago I started to have issues with the dashboard airbag light coming on about 10 minutes into every drive. This behavior started right after a tire shop did a 'courtesy check' when installing new tires which included a battery test. They came back saying the battery was weak (I had already known that--the original battery was still installed).

Anyway, roll forward a couple of months, and I was able to get a local Audi shop to get the codes while doing an oil change, and here's the result:

01794 Control unit wrong chassis number
Sporadic

00474 Immobilizer_control_unit
No signal / No communication
Sporadic

1212 Rear belt tension igniter, passenger's side -N197
Upper limit surpassed
Sporadic

Does anyone have any advice on how to fix this? Any help would be greatly appreciated.

Thanks in advance.