Panasonic VL2020 Replacement Battery BMW Car Diamond Key Fob E46 E39 E38
ALSO KNOWN AS: ML-2020,VL2020. BMW E39 and E46 keys (Commonly Known as Diamond Keys). Panasonic Battery. BMW E90/91/92/93 as well as many BMW key fobs from the early 2000's. (there are many guides on how to do this on the internet).