So... i got 2 keys when I bought my beemer, and one didn't work. I figured it needed a battery - since this is my first Beemer I didnt' know they charged themselves. So I drove it around for a while, and it still didn't work, the red light flashed though and that's when I realized this key is brand new. I think the dealer just had one key, so they had this one cut for me, and just never programmed it.
Do I need to go to the dealer to have it programmed or can you do it yourself? This is the "old school" key for the 99.