Review on Denso 234-4079 Oxygen Sensor: 🚀 Superior Performance for Precise Air-Fuel Ratio Monitoring by David Elam

check engine light is on. The code indicates the front oxygen sensor heater circuit on the driver's side. I checked out Revain as usual and bought 2 of these sensors. I've decided it makes sense to change both. Reset code (PO 155). The second time the engine was started the light came on again. This was the beginning of a costly diagnosis and repair. The tech told me it was a bad oxygen sensor which I didn't believe because I had just installed these new Densos. He insisted he wanted to remove Densos and install new OEM Mopars. bottom line; The OEM sensors solved the problem immediately. The cost of all this diagnostic troubleshooting and 2 new Mopar sensors is $640. Do yourself a big favor and buy the OEM. If I had done that from the start, my total bill would have been less than $200.