Not really a MS question, but does anybody know, where the connector for the rear O2 sensor is on a 2003?
I have a stock 2003 and it's throwing a P0037 code and I'd like to measure the sensor heater resistance before I replace it.

 

I'm not sure for a 2003 specifically, but I just removed my rear o2 sensor today, on a '96. The connector is under the carpet, under the drivers seat. You have to take out two plastic trim plug things so you can fold the vertical part of the carpet up. Reach your hand under the floor carpet and it should be there.

Again this is for a '96 NA but I can't see them being too much different.

 

Same place for my 04.

 

yep all 01+ non MSM's have it under/behind driver seat

 

Cool- thanks everybody. I'll check tomorrow.

 

And I don't remember exactly, but if your seat is still easy to remove, you might consider doing that too.

 

Took out seat. Found connector. Infinite resistance on the heater circuit. -> P0037 error.
New O2 sensor is ordered.

Thanks guys.