Does anyone know of a website that has a step through picture process to change O2 sensors and if it is a difficult job to do. About how long does it take also??? Thanks

 

Kind of depends on what car you have. But you knew that

 

Yea, it depends on the car, but usually they aren't too bad unless they are rusted in...then sometimes wrench clearance is an issue. It takes a 22mm wrench. Make sure to use some antiseize on the threads when you put the new ones in.

 

I have a 1999 Porsche 996. Thanks

 

If you can reach them, like on a lift or ramps, use a slotted socket for the wire and work your way around to find the faulty one,