So are you saying you have two 9w7 - one you bought new and doesn't work and one that you took our of a friends car, plugged it in to yours and it did work?
If so, I would check the number of the back of the unit and post up here as it would seem as if the one you have is not compatible and you have the wrong version...
2010 R36 (MY10.5), Biscay Blue, RNS510, MDI, Electric tailgate, sunroof, Superchips remap - SOLD
2016 Octavia VRS wagon, moon white, Tech Pack, 18" black pack, electric boot, panoramic sunroof, Bluefin
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