Originally posted by brianl703:
Originally posted by MarkO:

Not true. One is heated, the other isn't and I cant quite remember which is which. I think the lower (post precat) is heated. Dont quote me on that though.



According to the wiring diagram, they are all heated.

According to my visual inspection, they all have 4 wires. (Unheated oxygen sensors, which I've only seen on two vehicles, both mid-80s carbureted models, only have one wire.).

According to Bosch, Autozone, and http://www.oxygensensors.com the universal replacement is the same part number for both applications, front and rear.




Interesting. Autozone do show the same part #. Oxygensensors.com show different #'s for the OEM (terminated) type.

I don't understand why the wiring diagram show both sensors to be heated though. If this is true, there would be no need to have different shape plugs on the OEM style sensors.

Off to search I go ....

Bless our servicemen & women overseas. L.Cpl Ian Malone, 1st Battalion Irish Guards, R.I.P.