The instructions to program the keyless entry fob on one BMW model won’t necessarily work on another BMW model. You can try one of two sets of instructions and see if they work for your BMW. Your aim is to avoid resorting to the dealership, which may charge $50 to $100 for the service.
Instruction Set One
Make sure that all the doors, trunk and hood are closed.
Open the trunk door. Open and close the driver’s door.