O2 Sensor Questions
Contemplating an eventual O2 sensor replacement, I looked up some part numbers. This is what I've found.
Denso lists different part numbers for the up- and downstream O2 sensors. Both downstream sensors have the same part number, as do both upstream sensors.
NTK lists one part number for all four O2 sensors.
Bosch lists the same part number for both upstream sensors, but different part numbers for the left and right downstream sensors. However, according to the photos, the downstream sensors have different wire lengths which may account for the different part numbers.
Dealer prices for OEM sensors are ridiculously high so aren't even considered.
I'm partial to NTK and have had good look with them in the past. I had a problem with a Bosch sensor. so I tend to avoid them. I know it's anecdotal, but we all go by our experience.
As if things couldn't get more confusing.