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My car started having the turn signal hyper flash intermittently after about 3 years. Since I already knew how to recode for LED lights from my M235 days, I did the same coding on my M2C. Guess what, the turn signals gave never hyperflashed again. I think BMW didn't get their programming right after the switch to LEDs. You just have to program out the bulb check which BMW probably won't do for regulatory reasons.
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