🚀 Denso 234-4445 Oxygen Sensor: Advanced Air-Fuel Ratio Monitoring for Optimal Performance Review

Denso is Subaru's OEM. Ironically, this one replaced a generic one I bought from an online auto store that only lasted about 5,000 miles. I don't know why but I've read on many forums that OEM sensors are important for Subaru. I thought it was nonsense and didn't listen. Well I paid the price and had to replace it again within a short time. Denso for Vinso! (I know Dad is joking.)

Ever since I bought this car (used) there has been constant knocking in the engine even though the knock sensor has been replaced with higher octane fuel etc. Then one fine day check the engine light came on indicating a bad rear sensor, followed by an almost complete engine shutdown on lift off (yes it's a manual transmission). I bought this part and installed it myself and voila, the engine knock is gone and the dead center start is better than ever. Also noticed improved MPG and…

It may be my imagination but my car seems to be running a little better since I replaced the O2 sensors at 170,000 miles. Denso (Japanese company) is original equipment. Manufacturer (OEM) so they are perfect to replace the old ones on my 2007 Subaru Impreza 2.5i. They're packed with an anti-seize compound for extra high temperatures so they don't get permanently stuck in your exhaust system. All you really need to get the job done is a 22mm open end wrench and wire cutters (side cutters). I…

Replacing the oxygen and air/fuel sensors was caused by MIL with P0420 on my 2006 Subaru Forester with 155,000 miles. I just bought a car for 150,000, the head gasket was just replaced in the car. The air/fuel gauge was a green tint which led me to suspect it was contaminated with antifreeze. I installed both air/fuel sensors at the same time and reset the MIL gauge. I drove about 450 miles before the MIL came back on with P0420. I poured seafoam in the throttle body which really made the car…

Installed this sensor on a 2012 Subaru Impreza. Those of you familiar with O2 sensors will understand that this is the wrong part number for a car. I needed the extra wire length so I could install the O2 sensor gasket to get rid of the P0420 code. Here is some information on Subaru O2 sensors if you are interested in replacing them. Almost all Subaru use the exact same O2 sensor ports. The only difference is the length of the wires and the use of the screen. Here are most of the part numbers…

A perfect match for and replaces the original 2006 Forester X parts including wire splice, wire clip and even insulation paint. Contains more than enough XP fat. The car occasionally flashed engine light codes that indicated the catalytic converter was below the efficiency threshold. Most recently, he threw a new one about becoming too rich. I replaced both sensors. They had 180,000 miles on them. Hopefully this should fix things. They usually last a long time, but not forever. This can be done