Review on Denso 234 9077 Air Fuel Sensor by Marlo Schlachter

Part was identical to the half price dealer part. Better, the dealer said 6-8 weeks to get the parts. My mechanic said I have to wait. I offered to find parts, he said GOOD LUCK! First there were aftermarket parts under $50. The mechanic said they would cause more trouble than they were worth and gave me a clue on how to identify the OEM parts. This sound and he agreed to install it. Installation went without problems. The old funny starting problem is gone and the new misfire problems are gone. It's been a while and the car runs like new! PS Really cheap parts don't use the same internal technology so they can easily give incorrect data, worse they don't have a heat shield. which will cause problems on the track. It seems like the best bet would be to use 3rd party OEM parts.