Review on 🚗 GM Genuine Parts AFS109 Heated Oxygen Sensor: Optimal Performance for your Vehicle's Oxygen Level Monitoring by Jorge Tupou

I have a 1997 Cadillac Eldorado. Both top sensors have failed. If your old sensors are AC/Delco AFS125, they are a direct replacement for AFS125. After installing the new sensors, my Caddy runs like a new car! Couldn't believe it! Made a big difference! When installing, make sure you have both a 7/8" deep well sensor socket and displacement sensor socket of the same size. What made the installation easier for me was using a 7/8" goose foot. The crow's foot makes it much easier to screw the transducer in and tighten to 35 ft-lbs. The sensor sockets are only used to remove sensors. The offset sensor socket allows you to remove the sensor without lowering the motor three inches. AC/Delco AFS109 works great in my car! No complaints!