tta300 Posted June 10, 2004 Share Posted June 10, 2004 Has anyone replaced bank 1 oxygen sensor before? It is somewhere close to the firewall, but where? I can not see it from the top, or do I have to remove some parts to gain access to it? Quote Link to comment Share on other sites More sharing options...
SKperformance Posted June 11, 2004 Share Posted June 11, 2004 serach and you will find all of it discussed before in a few forums Quote Link to comment Share on other sites More sharing options...
douglasmiami Posted June 11, 2004 Share Posted June 11, 2004 Yes - there were extensive discussion on this. Do a "Search" for oxygen sensor. I had to replace two of mine, but I let someone else do the work. It wasn't worth the frustration for me. But if you buy replacement sensor, make sure that it's compatible. I remember certain other, less expsensive sensors working, but you had to rig them. Quote Link to comment Share on other sites More sharing options...
dgorrie Posted June 12, 2004 Share Posted June 12, 2004 I haven't replaced that sender on my '99 RX300, but I did have to disconnect the leads to it to measure resistance. I got to it from underneath, slightly right of center (toward the passenger side slightly), near the firewall. Look at the one at the front of the car to get a feel for what the connector looks like, and you'll see a similar one where you want to be working near the firewall. Might be something of a pain to get to, and getting the connector apart wasn't easy since you need at least 2 hands up there. Maybe if the car had been on a full lift that would have been easier, but I was on my back and kinda contorted. Quote Link to comment Share on other sites More sharing options...
tta300 Posted June 13, 2004 Author Share Posted June 13, 2004 Thanks for your input. I replaced mine with some liquid wrench, an open wrench, and a mallet. It took a lot of patience but a doable job. My rx300 has only 72,000 miles. I just wondered why the sensor would go bad prematurely. The code was P1135-bank 1 lean fuel. I replaced the correct one for sure. Quote Link to comment Share on other sites More sharing options...
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