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      03-26-2013, 07:15 AM   #3
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Drives: E92 335i XDrive
Join Date: Dec 2012
Location: Boston

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Originally Posted by MBP0202
No you will not get a CEL if you delete the secondary cats. The second set of o2 sensors are before the secondaries.

Now if you remove the primaries then that's a different story...
That's what I thought but I was reading something that said otherwise
07' E92 328xi (First BMW)
09' E92 335xi (Current Car)
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