Just to share, one of our F10 Crew Members did it outside and installed a non original BMW Rear Camera. Due to some claims that he was doing, BMW dealer (don't want to name the outlet) issued a letter stating that his warranty is no more applicable until the wiring is restored to original. IF reinstall to factory, then warranty re-instated. The electronics in the BMW are a no play play section in my opinion.
He was asked to remove the rear camera and reinstall the cable which apparently the installer cut into to tap for the power. Not sure how much its gonna cost him to repair that wire.
So, if you are worried about warranty, go original. If warranty has past its expiration date, them its up to you to decide. All the best.
Yours faithfully,
F10 Crew