The only one I seen successful was a 3 series on YouTube. And it seemed to be factory...it was also a euro model. Euro models always have better options anyway. Everything in this car is tied together via fiber optic and that's not something you wanna try looping cutting into.

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'11 Acadia Denali
'07 Tahoe(SOLD)
'02 745i
'00 Avalon
'06 GSXR1000(SOLD)