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Originally Posted by TXM32B
Did your O2 sensor(s) go out during normal operation of the car? I had an aftermarket x-pipe and high flow cats installed and have experienced the same issue. Is your M3 stock or modified? Thanks.
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TX did you ever get this issue resolved? I've got an '08 M3 E92 high flow cats with a custom x-pipe, ran great for months code just popped up about a week ago. Thanks in advance for help, Rob.