This is just for reference sake for anybody with this problem next time. I have a 2003 solara automatic federal spec with a v6 engine. I received a check engine light and got the dct being p0135. This was a short in my O2 sensor located on bank 1 sensor 1(on the back of the engine near the firewall). Removing the bank 1 sensor 1 O2 sensor had the inscription:
I'm not too sure about this, but I'm pretty confident that the bank 2 sensor 1 O2 sensor(the one near the radiator and easiest to get to) is the same number and model. Looking for a replacement for this O2 sensor, I went to densoaftermarket.com to look for which part I needed. It listed four parts:
234-4622 - OE Style; Front; Standard
234-9021 - OE Style; Front; Automatic
234-4137 - OE Style; Rear; Standard
234-4137 - OE Style; Rear; Automatic
I bought the 234-4137 as my car is automatic and thought the rear meant rear of the engine(bank1 sensor1). It turned out that this part didn't have the right connection to replace the bank1 sensor1 and looked as if it fit the bank1,sensor2(after the catalytic converter). Here's a pic of what i mean.
The 234-9021 looks like what I need to replace my part even though it says front. I'm assuming that front means that it's for the whole engine(bank 1 and 2, sensor 1) and that rear means after the catalytic converter(bank 1 sensor 2). If you're looking for a Bosch product, the 13540 is used for both before catalyst front and rear.
Use this site to look it up:
http://www.boschautoparts.com/Resources ... artFinder/
13540 Oxygen Sensor - OE Type Before Catalyst Front; A/T; Check /
13540 Oxygen Sensor - OE Type Before Catalyst Rear; A/T; Check /
13353 Oxygen Sensor - OE Type After Catalyst A/T; Check /
So the bosch website also leads me to believe that both the front and rear use the same model for the oxygen sensor and that the denso site was slightly wrong or I was just confused on how they distinguished between the oxygen sensor.
Hopefully this can be used a reference and will help people out. BTW, it was a pain getting the rear oxygen sensor off. To get the electrical connector off, I had to press a release notch and wiggle it out. Just be gentle and it should come off eventually. For the sensor itself, i bought the O2 sensor tool with a crows feet and attached my wrench. I added a metal pipe for extra leverage and more torque. I eventually got it off but it was a pain. Good luck to all you DIY'ers.