jose martinez Posted December 27, 2010 Share Posted December 27, 2010 Can anyone tell me where bank 1 sensor 1 is located. I keep getting in front of the radiator but others say by firewall Quote Link to comment Share on other sites More sharing options...
jose martinez Posted December 27, 2010 Author Share Posted December 27, 2010 IN A 99 LEXUS ES300 I FORGOT TO PUT THAT DOWN Quote Link to comment Share on other sites More sharing options...
intakerGS Posted December 27, 2010 Share Posted December 27, 2010 Bank 1 sensor 1 is between the radiator and engine.. Bank 2 sensor 1 is between the firewall and the engine (back side of engine). Quote Link to comment Share on other sites More sharing options...
jose martinez Posted December 27, 2010 Author Share Posted December 27, 2010 THANKS FOR THE HELP I APPRECIATE IT Quote Link to comment Share on other sites More sharing options...
mkeeney Posted December 28, 2010 Share Posted December 28, 2010 Bank 1 is against the firewall. Some of the diagrams at the auto parts stores show it as the front bank, but they are incorrect. This page is from the Lexus factory service manual. My Haynes manual also agrees with bank 1 as the rear. Emission Control System.pdf Quote Link to comment Share on other sites More sharing options...
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