BMW 3-Series (E90 E92) Forum - View Single Post - Bad o2 sensor or just because catless now?

mweisdorfer · 12-16-2020, 03:52 PM

If the o2 sensors are over 100,000 miles old, putting catless down pipes can cause issues with them.

You can try and reset them in MHD. My guess is that you'll be forking out $350-400.00 for 4 new ones

12-16-2020, 03:52 PM	#10
mweisdorfer Major General 1907 Rep 6,968 Posts Drives: 2007 Black/Black 335i e90 Join Date: Apr 2011 Location: Holly, MI iTrader: (0) Garage List 2007 BMW E90 335i [0.00] 2008 bmw x5 [0.00]	If the o2 sensors are over 100,000 miles old, putting catless down pipes can cause issues with them. You can try and reset them in MHD. My guess is that you'll be forking out $350-400.00 for 4 new ones
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