Well I ordered an O2 sensor from UDR and after taking the old one off and sliding the new one in I relized that the plug was a little different than the original...so I pulled it out and slid the old one back in to get me by til I could get another one and when I tried to bolt it back on I stripped the stud that holds it in place...I don't know what to do now...I'm riding with one stud holding it in place...so I'm ill with URD for selling me the wrong part and worried that the truck is gonna let me down before I can get it fixed...I wonder if the stud can be re-threaded?

 

It could be you needed an A/F sensor instead of an 02. It depends on your year and whether it's a Cali-spec vehicle.