you need to replace following parts
front door handles, front door wiring (handles with open contacts, wiring with special plug for such handles)
add front door CA antennas, rear antennas, CA module, two CA keys
it is better to get them from car breaker because it is not possible to order blank CA keys
after that you need to bring all this to experienced BMW tech who synchronize new keys with your car
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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.
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