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I've seen it happen to mine every now and then. Less so now that I had the ECU updated to the latest rev to fix the idle dip issue.
I don't think its anything to be concerned with, just a matter of the voltage dipping a little low when the alternator current drops off and the draw starts coming from the battery again. Its not as noticeable in other cars without LED DRLs because the voltage drop is very brief. Normal lights would just slightly dim whereas these LEDs flicker.
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