Walker Products 250-54007 4-Wire Air/Fuel Ratio Sensor

Sensor failed almost immediately. dont waste your time or money.

I purchased this as a replacement to the Denso factory unit. However as soon as i put this unit in i started having problems it almost seems like the sensor is not calibrated. It got worse and worse with running rich. After 6 days of having it in now it reads 0volts 50% of the time, changes very sluggish and gets worse the warmer the sensor gets. It is making me run a 9.0AFR at idle (0Volts) I have to take off my whole down pipe 3 hours of work to switch this unit out and now am forced to go buy one from the local stealership because my car is not drivable at the moment. my 2 cents, stick with factory parts aka denso they may be more money but apparently worth it. To give a little bit more info i have a 2008 Scion XB Automatic

I tried some off ebay and while the unit worked, the Fuel Air module did not. Tried two from that seller... This was what was actually needed. It is both a Fuel/Air and Oxygen sensor as required by my vehicle - a 2006 Toyota Highlander. With the right tool, change out is quite simple. Without it... what a pain in the ..... Any way, if this is what you need, This is a good buy.

07 scion tc up stream air fuel ⛽ sensor. I tried the ebay sensors and they did not work two of them and plus the wire was short I was about to give up when I saw this one on here I sed let's give it a try and I did it fit it has lenth and it works its working perfect for my scion tc.

06 Scion TC, upper oxygen sensor replacement. Worked instantly and the check engine light turned off. Changing it out does require a special socket, but you can rent them from AutoZone if you don't want to purchase it. The mechanic quoted me about $350 to change this out, and took me 20 minutes after finding the part here on Amazon.

Works great thus far! Good for the price!

I installed this upstream O2 sensor on my Scion tC. Installation was a bit of a pain-- but that's the due to the build of the car. After installation, my CEL went off. My car is running great! I have regained all horsepower and standard gas mileage! Steal for under $100.

Worked great as an upstream AF sensor on an 07 es350. No more check engine light. Plug and play