SOURCE: Air bag warning light stays on
You have to use VagCom (the diagnostic software that Audi uses) to turn off an airbag warning light. If you have a laptop that can go out to your driveway, go to www.ross-tech.com and download VagCom (it's free). Go on eBay and do a search for "Audi TT vagcom cable" and you'll find the interface cable for about $20. Buy that, and then you'll have the software to do it.
If you're not able or interested in it, you can go to the dealership and have them turn off the light - they'll charge you an hour's labor to do it (it takes less than four minutes, but they don't care - you're going to pay them between $60-100 to do it).
What you need to see is which bag is tripping the warning. On the A4s, it's usually the driver's side airbag (built into the seat). Moving the seat too far back or down tends to pull on the electrical connector for the airbag, separating it just enough to trip a warning light. When mine did this in my A4, I zip-tied the connector tightly to keep it from separating, then turned off the light, and have had no problems since. When you look under the seat for the connector, it's the yellow one (airbag wiring connectors are always yellow, as mandated by law). Just be careful not to pinch the wires when you tie it.
SOURCE: 2007 Passat wagon. I need to reset the air bag warning light.
the air bag light will only show if the ignition was turned on while it was disconnected.
it will defo need to be pluged into the computer to be put out but some smaller garages will have the software to do this and will be a little cheaper.here in ireland VW wanted 50euro to do mine but a small garage done it for 30euro.
you can buy code finders/reset gadgets on ebay but might not be worth it for one job compared to $130.
my suggestion would be to get the main dealer to do it if a normal automotive shop cannot access it.
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