BMW 3-series Key Fob Battery Replacement DIY (Diamond Key)
How to Recharge Your BMW Remote Key - BMW Inductive Battery Charging – Bimmernav Online Store
Diamond Key Rechargeable Battery Replacement DIY
Key FOB question | BimmerFest BMW Forum
These are the steps you need to follow in order to program remote Diamond Shaped Key on the BMW cars. These type of keys remote was used on BMW E46, E39, X3,
Bimmerforums - The Ultimate BMW Forum
W/rechargeable battery Remote Circuit Board 3 Button 315MHZ for BMW E46 Key Fob | eBay