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      11-01-2012, 12:02 AM   #1
Mr. Liu
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Drives: '11 M3 '14 E63 '05 E55K
Join Date: Jul 2010
Location: Southern California

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Electrical Error / License Plate Light Malfunction

Hey guys,

I am a very annoying license plate light malfunction going on. Bulbs are fine, fuse is fine. Took it into the dealer and they turned it away because I had LED interior lights, told me to swap them back to stock so they can run a diagnostic on it since according to them "LED aftermarket lights will send wrong signals to our computer."

Anyone had this problem before? Is the whole swap back to stock to run diagnosis true?

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      11-01-2012, 01:07 AM   #2
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If you bring it by I might be able to fix it since you are local.

Some lights do cause problems and the NFRM module thinks the light is shorting out and cuts power to them. I have seen this on interior lights a few times, and it throws a fault immediately for it as the light shuts off.

Possibly turning off the checking for that bulb could fix the issue for the licence plate lights. For the interior ones there is no fix that I know of. I have LED ones and they have been working fine since I installed them a long time ago.

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