Originally Posted by 95BonnevilleSESC
I have used Bosch plugs (which are real crap) and Bosch O2 sensors (in my VW Cabriolet). I didn't have any problems with the O2 sensor--just the plugs (three months and I had to replace them again in my Bonneville.--Before I was a member here. I learned the hard way.)
In playing with the turbo Dodges, one of the basic things we do before turning the boost way up is install an Air/Fuel guage, takes the reading directly off of the O2 sensor.
I can tell you definitively that the Bosch O2 sensors SUCK for 2 reasons: #1 they die very quickly, get very slow reacting very quickly and make the puter struggle to maintain closed loop, and #2 they *always* read a lower voltage than they should, making you run richer.
Go with OE!