Supraman16

iTrader: (5)

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?

bnizzle87

234-9048 is the part number I used when replacing my oxygen sensors.

Enjoy the headers, Darshana!

6i9

iTrader: (1)

Downstream Denso 234-4521 Oxygen Sensor (Air and Fuel Ratio Sensor):
Upstream Denso 234-9048 Air Fuel Ratio Sensor:
Someone else had your question about 9048 vs 9051 https://www.clublexus.com/forums/is-...lp-needed.html

Supraman16

iTrader: (5)

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:

2008 to 2012: Denso 234-9048


2013 to 2014: Denso 234-9058

josh810

Are u welding in cats Darshana?