Originally Posted by a0s4957
Thanks for your help, i think you are right. I am going to first fix a leaks in the exhaust i found. If this doesn address it i will move to changing both o2 sensors.
Actually some of your problem could be vacuum leak. So yeah, fix the exhaust before you replace the O2 sensors.
'09 E92 ///M3 Interlagos Blue,6MT
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