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Old Tue, Mar-13-2018, 10:50:41 PM   #38
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Default Re: M3 E46 Pre Cat O2 sensor replacement...

Motorcraft DY1303, DY1311, among others, but those ones I can confirm. I still need to check the pinout and connector against the typical aftermarket Bosch LSU4.9, but the sensors are legit Bosch.

Bosch and NTK are probably the two biggest suppliers of wideband UEGO sensors to the auto industry, and most new vehicles these days have factory widebands so they are getting very cheap. I'm sure there are other OEMs using the same Bosch sensors, but I haven't searched around much.
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