Review on 🔥 ECCPP Oxygen Sensor 234-4018 234-4012: Perfect Fit for Chevrolet/GMC 4.3L 4.8L 5.7L Models 96-02 - Heated O2 Sensor Upstream Downstream 4PCS by Will Kern

Our 2002 GMC Savanah engine had a bulb and the emissions failed. Based on the auto scanner error codes we purchased these oxygen sensors they fit perfectly as listed and are working fine. My husband replaced the MAP and car computer and installed these O2 sensors. Engine light stays on, two codes left. We took our car to an emissions certified mechanic, he checked the systems and found that the oxygen sensor was not working properly. He checked the systems and changed the sensors and the check engine light went out and there were no more error codes. Although the van worked well before, it works great now. I would not recommend buying these parts and would advise you to take your car to a certified emissions specialist. We would save ourselves a lot of headaches if we went to an exhaust mechanic first.