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Old 03-10-2008, 04:37 PM   #1
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Join Date: Aug 2003
Location: San Diego
Posts: 594
My Ride: 2004 325Ci
O2 Bank 2 Sensor 1, which one?

Question for you guys: which O2 sensor is the Bank 2 Sensor 1? I know it's the Pre-Cat sensor, but which one is it. There are two, one closer to the firewall and one closer to the front of the car.

Can anyone tell me which O2 Sensor is Bank 2 Sensor 1?

Thanks a lot.
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