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Old 09-02-2012, 11:41 AM   #15
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Join Date: Aug 2006
Location: NJ
Posts: 23,174
My Ride: '99 328i 300K miles
#16 would be post cat that...not the #1 or the #15...again, on the assumption that the #4 sensor code you got was bank 2 sensor 2...can't imagine it'd be anything else.

Pricey bugger, but I know you can find them for under $100 around.

Also, first I'd make sure that the connections are good. Have you cleared the codes and the same one returned?
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