i have 2006 525xi guy was in accident and now i have i drive fault information telling me tensioner is faulty keep your belt on. but foxwell n510 elite i saying it is front passenger side sensor. i was here before checked the sensor replaced it it say the same thing front passenger sensor. so now i want to move from that and try to replace module or tensioner is that wise and am i looking at right place or should i keep looking at sensor arrea like code reader is suggsting

 

What OBD code is it?

Depending on the seat option, there is also a pyrotechnic device in the headrest. I know the "comfort seats" had that in 2006 because I have that in my car.
There is a pyrotechnic device in the seat belt tensioner that pulls it tight in a crash.

Not sure what "front passenger side sensor" might be referring to.

 

yes I think have to reset that I will take seat out and try to reset that device