Hey man, I have the same problem. Seat belt sound, crash warning sound etc not working. Have you sorted out your problem?

Hello everyone. I have a 2011 XC60 2.0T. My seat belts warning is mute. When I put on the belt, warning light goes off but when I drive without belt (to test the sound) no beeps. Also, the the Driver Warning light works (when too much approach to car at front) but the warning sound doesn't work ...

Guys, any idea about STC issue?

Yeah, my highway is same, too. Heavy city traffic max 14 lt/100km.
I can get the part number from my dealer, that's no problem, but I hope online seller send the correct part. I found Bosch in my country with a cost of 50 USD approximately , but will keep searching.

Hi Oragex. Now I am almost sure it is O2 sensor. I had some research after opening the topic, and yes all were O2 sensor issue. One of the guys strictly says it should be replaced with OEM sensor.
So, you replaced with ntk/ngk and problem solved, right? It also reduced your average consumption?

Hey Guys,
First of all, I thank you all. I have learned so much about my car. In my country, not many people drive Volvo and forums here not good. We are not used to DIY so people only share pictures of their Volvos, upgrades etc... Useless.

2 years ago I bought my 2002 S80 2.0T (gasoline ...