🔌 Denso 234-4669 Upstream Oxygen Sensor: Reliable 4-Wire Harness with Trapezoid-Shape Plug - 14.5 Inch Review

Denso and NTK are the only O2 sensor brands I will be using. I tried the ones available at auto parts stores and got bad blocks that I had to replace immediately. This has never happened to me with Denso. Spend a few extra bucks and wait a few extra days to get quality and get the job done once.

Perfect for my 2005 Escalade, upstream replacement for bank 1 sensor 1. The old O2 sensor was a little hard to come by. I had to heat the old one with a blowtorch until it turned cherry red and then unscrew it with a 7/8 wrench. The hardest part was releasing the click sensor harness due to the tight location (the drive shaft interferes).

In my experience, Denso sensors work better, last longer and have a lower DOA than comparable Bosch devices. This is a genuine Denso part, fits perfectly, works as it should. Buying through Revain is a lot cheaper (just under 50% off) than the local auto parts store, and the premium shipping makes the overall purchase price lower than what the big online parts retailers sell them for.

I get ODB2 codes P0054 and P0060 immediately after installation. I used an ohmmeter and it reads below 6.0 which is not to Chevy's spec. I bought these 2 O2 sensors on April 18, 2018. I couldn't install these O2 sensors fast enough to return them within 30 days. Denso states that warranty claims must be processed by the seller/dealer. 2 O2 is not guaranteed. I bought sensors.