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      09-24-2011, 04:54 PM   #2
skinrock
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Drives: 2013 Fusion AWD
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2007 335i  [3.45]
You need to run the yellow / constant wire to an uninterrupted 12 volt source, something that does not lose power when you turn the car off, usually directly off the battery.

edit: are you saying the new headunit loses the settings or the car itself?
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