I've heard there are compatibilty issues with a bosch rear o2 sensor on our cars. I just cleared a code, but should I expect another with a non ac delco sensor, or should I be good?

 

also how hard is it to remove the stock one. i remember seeing threads about lots of people who couldnt get theirs out of their stock DP

sorry for thread jacking

 

Pretty easy. Put on a 22 mm wrench and turn it.

 

sweet thats what i was hoping to hear and thats what i figured. but i just remember people having problems and wanting to cut wires and stuff

bump for the OP

 

I just took them off my 08 today. Didnt even need pb. But if they dont come immediately shoot with pb and wait for 10 min and try again. The one in the engine bay can be a bit harder but its still possible to do in the engine bay. The one on the downpipe is simple as hell. But worse case scenario take off the manifold put in a bench vise and and then try

 

This. I had to pull the header off to get the one out of that, but the one on the DP is pretty easy. It'll be torqued down snug, but should come free with a moderate amount of persuasion.

I will say this, ever bolt I removed on the Cobalt has been so easy to get out and I have yet to have to bust out the PB Blaster at all. Then again, I'm used to working on my Jeep whose bolts and nuts fuse together moments after they're torqued down... Chrysler should take a note from GM on fastener coating selection because GM's done it right. Then again, the Jeep is 8 years older than the Cobalt, but even wrenching on the Jeep when it was 2 years old was a huge PITA...

Sorry for the tangent.


Also, OP, if you're interested, I have a stock rear O2 sensor for sale here if you keep having problems with the Bosch. It's got 35k miles on it, but it's in good shape.