[Topbannana]

I have I remote key and would like an additional one .
If I purchase a additional key how do I program it or where to get the code to program it ?
MTIA

[timelord]

depend on for which car.
for example F series ,if you get key from dealer, simply get it into car, pusch start button and get key near key reader (right side of steering wheel)

[RocketSurgeon]

If you buy a blank key, it requires some rather expensive tools to program the key to the car.
If you get a key from the dealership, it's already programmed for your car, you simply initialize it by putting it against the inductive coil in the car. On E-series you stick it in the little key socket, on F-series you put it against the side of the steering column.

[simzep]

For E-Series you would need a virginized key and the "BMW Multi Tool" for a hefty $800. There are ways to do it by soldering directly to the ecu and using a raspberry pi for the programming but that is even more risky.
A key from the dealership should cost about $200 so you can loose 4 keys before the MultiTool pays for itself.

[willisodhiambo]

If it is one time use, buy from the dealer, its cheaper. If you have opportunity to make keys for others, buy a key maker,
1. Yanhua
2. Tango,
3. CGDI Pro
4. And on and on

Original some clone, choice is yours.