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Originally Posted by m3 guy
Any updates at all? Still no light?
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We're about 600+ miles into it. No CEL with the HFC downpipe so far. We'll likely release it with a notation that with the current ECU version it shouldnt trigger a o2 sensor code. We'll get the ECU map version from the dealer. BMW likes to update the maps sometimes but you can choose to not update them for example.