Ok, so I bought a 2003 A4 1.8t about a month ago. Since then, the check engine light has been on everyday I've owned the car. Even after I took it back to the dealership and they fixed it, or said they fixed it. The light came back on 3 days later. So it's back on now, but the Airbag light is also on. It's steady, and it's been on for about 2 weeks now. Any ideas on why this could be happening, or how much it's going to cost me?

 

You need to get the exact error code for the airbag,
then google it.
My A6 needs to have the airbag module reset, but your case may be different.
Borrow a vag-com and we'll be able to help. If you have a laptop just get a cable on ebay; that should suffice for what you are trying achieve.