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I'm getting my headers installed and the stock upstream/header oxygen sensors are stripped. I'm trying to find the correct Denso Oxygen Sensors but there are multiple part numbers. I wanted to save some cash and not go with the "Toyota Branded" sensors...which are essentially the Denso Sensors marked up. The part number I got from the Denso website was 234-9048 whereas some sites state 234-9051. Both look quite different, one has a cone/pointed tip, where as the other one is more cylindrical tip. Anyone know the correct Denso Upstream Oxygen Sensor for my 2008 ISF?
Thanks everyone for your help. I did a bunch of research yesterday and found some interesting info. It looks like Lexus switched to a different upstream/primary O2 sensor for the 2013 and 2014 model years. So the Denso equivalents are as follows: