I have a 2003 Ranger with 3.0 and an automatic transmission, I was looking at replacement O2 sensors and on Bosch's site: https://www.boschautoparts.com/en/auto it shows a different part number for the downstream vs upstream sensors, anyone have access to what Ford lists for them under Motorcraft or whatever it maybe. I did do a search and saw a couple of posts that claim they used all 3 the same part number so......I would like to confirm as the ones Bosch lists look different besides wire length, Thanks for your time!.

 

The different part numbers are for the length of pigtail/lead that comes on the O2 sensor

The O2 sensor itself and the connector are exactly the same, only the length of the 4 wires is different

So do you need a 6" lead, 12", 18" ect................to plug it in to the vehicle harness

So yes, you could use 3 O2s with say 12" leads, so same part number, and coil up what you don't need, on the one(s) that only needed 6" leads

There are only 2 kinds of O2 sensors, narrow band, and the newer wide band
Rangers all used narrow band, .1-.9volts, under 1 volt
Wide band uses 0-5volts