Quote:
Originally Posted by matoneski
Hi,
I have a 2020 m135i stage 2 with a high-flow cat downpipe. The Check Engine Light (CEL) keeps coming back on. Has anyone else had an issue like this?
Side note, there is a strange fluttering/ticking noise that increases with acceleration and under boost from 3k revs. It only makes the noise when moving. Any ideas on that would also be appreciated.
Thanks,
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the fluttering is the wastegate yes.. however, having fought with my dealer and won in that they agreed the noise wasn't right and eventually took the car back with full refund. I then bought another M135i thinking it was just my car. Nope, they all seem to do it.
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[Current] F40 M135i ('23) / [Gone] F80 M3 CP ('18), F36 435i ('15), F25 X3 30d ('13), E84 X1 23d ('09), R56 Mini Cooper S ('07), E60 M5 ('07), R53 Mini Cooper ('02), E60 545i ('03), E36 328iS ('98), E36 320i ('93)