Recent content by epbu

According to factory service manual, there is only 4 wires on the bank1 sensor1 but the recommended "NGK #23506" has 5 wires. Does anyond know, which of these five can be left out?

I'm guessing both sensors have been changed by previous owners since the vehicle has 110000 miles on it.

There is no plug on the vehicle. I changed the bank 1 sensor 2 last year. There were different plugs in both ends, but I managed to connect the wires, because there were only 4 wires in both ends and I had help from NGK wire Diagram

I have -97 2.5 also. Just received the "NGK #23506 - Bank 1, Sensor 1 (Upstream)" and it has 5 wires !? Gray, white, blue, yellow, black. Old sensor only has 4 wires, 1 black and 3 white (no connector). I'm not making sense in this. Can I disregard one of the 5 wires, which one?