S80 Airbag Fault

It's not uncommon for Volvo S80s of that era to experience airbag issues. The warning light usually indicates a fault. Have you had the car scanned for diagnostic trouble codes? That would give you a clearer idea of the problem.

Scanned for trouble codes? I'm not sure how to do that. Is that something I can do myself, or do I need special equipment? If it is just a code, is there a chance it's related to an airbag recall?

Scanning requires an OBD2 scanner, which you can purchase or have a workshop do. While recalls are possible, a scan will pinpoint the fault, which could be a defective cable or plug connection. You can also check for an active recall with your VIN.

Thank you so much for the advice! I took it to a local garage, and they scanned the system. It was a faulty connector, just like you said! The total cost to fix it was only 95€! What a relief. I was expecting a much bigger problem. Thanks again!