BMW Key Initialization Procedure
This procedure will work for all keys that are not the square style key. This is the full procedure on how to initialize your old or new keys or to add a key to the vehicle. This would be for 3 series, 5 series, X3, X5, and 7 series.
How To Replace A BMW Key Battery and Key Troubleshooting
Key troubleshooting for comfrot access and remote function not working. Replacing the key battery on a comfort access key.
BMW Remote Key - Otto's BMW: Customer Experience Center
Most BMWs come with two multi-function remote keys.
DIY- BMW e46 key fob battery remove/replace
This is how I fixed my key after it wasnt working well lately, it would work only few times and after i went to the dealer they told me I had to buy a new key for 230$...i said...HELL NO! so i found my way around and hopefully i can help you guys save some money too. good luck, be smart, be safe and... BE POLITE WHEN POSTING COMMENTS...thanks