The legendary alarm kits got its wiring addition
kit for E90, E92, E91 without panoramic sunroof, E82
250 USD with shipping
shipping from Europe
you can also can check this thread if you car is prewired
https://www.e90post.com/forums/showthread.php?t=1449882
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E81 2007 130i 6cylinder Montego blue
Retrofits: Harman Kardon, High-beam assistant, Removable tow hitch. Auto-dim folding exterior mirrors. Lumbar support. Perfomance Brakes.