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Hi guys! I'm newly registered to this forum but I've been coming here for info ever since I got my ZX3. Anyway, my question is pretty simple, do any of you know the exact part number for the upstream O2 sensor on a 2003 Pzev 2.3? I would like to know before I buy it, I don't trust the guys at Autozone
 

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Motorcraft DY1043 Oxygen Sensor.

This is the sensor I installed in my 2.3 engine (upstream position).
Thank you so much! I was going crazy trying to find that number. Now, just yo be clear, the conector for it is the one on the passenger side over the valve cover, correct?

If you're wondering why i'm asling such question, well I live in Tijuana, Mexico, and when I bought the car it didn't have a cat and just one O2 sensor, the one that goes after the cat. That sensor is connected to the driver side of the engine, where there are two connectors right next to each other, one of then is not connected to anything, I guess those are for the cat. I hope I made myself clear
 
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