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

I really have no complaints about these sensors. I also use Bosch sensors, but since I don't have any problems with any of them, I choose the best value for money. I swap them out at the factory-recommended intervals and have noticed that the fuel economy improves by one to five MPG instead of dozens of MPG. Make sure you buy the right sensor for your car, and if you notice really crappy fuel economy, chances are the sensor is being used beyond its end of life.