O2 Sensor ? - BMW Forum - BimmerWerkz.com
3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

 
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#1 (permalink) Old 03-11-2004, 11:51 AM
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I have a 2000 328ci with an intermittant CEL that codes out as "O2 Sensor precatylast bank 2". I am wondering which is bank 2? The one nearest the firewall or the one closer to the grill? I have also heard that these should be replaced in pairs, ie: Both precatylast O2 sensor should be replaced at the same time. If that is the case please explain why this is.
Ben

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