🔧 Enhance Engine Performance with Denso 234-9108 Air Fuel Sensor Review

Perfect replacement for 2012 WRX. I have a Killer B Holy header and although it was tight it fit. I highly recommend the Crow's Foot O2 Sensor Tool to help with the installation.

It worked as advertised on my 2011 Subaru WRX. But for me it turned out that I should have done more research because the real problem was the fuse under the passenger side dash. Fuses for O2 sensors are not found in regular fuse boxes so check them before ordering. My code was that the oxygen heater circuit wasn't working (or something), so I assumed the oxygen sensor had failed (70,000 miles). Don't think - check your backup - as soon as you find it!

Bought this Denso fuel gauge 234-9108 for my 2010 Subaru Forester XT. This solved my problem with poor gas efficiency. I was at 17mpg, now I'm back at 20mpg. I had a problem: Denso, the manufacturer, listed the wrong part for my car, so Revain recommended the wrong part as the correct one. After figuring out what happened I was able to order the correct part and Revain emailed me a return label for the wrong part. Not their fault but they got it right. Make sure you check the electrical end…

I saved $500-$700 by being able to order this and replace it myself. My 2013 WRX wasn't accelerating properly, bouncing around, from what I found online it was probably the O2 sensor. I took it to a mechanic and told him I think the O2 sensor needs replacing. They didn't agree, instead they changed all my fluids. Didn't fix the problem. I brought it back to them, they still didn't think it was an oxygen sensor, they changed the spark plugs for me. Didn't fix the problem. Told them I wanted to…