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I would love to here some reviews on the 09 coupes that have purchased the grounding kit. Blackbetty, could this void any kind of warranty?
The addition of the wires themselves doesn't necessarily void anything. If you have some specific malfunction that is shown to be caused by adding the wires, it would not be covered. That will not be the case with proper installation. So the simple answer is no, it won't. However if you have any unrelated electrical problem, you should probably remove the wires so that the dealership won't try to use them as an excuse to deny your claim. That's what I'd do.
