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      04-11-2010, 06:01 PM   #3
onesuperboi
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Drives: '08 e92 335i COBB 4.01 Stage 1
Join Date: Aug 2008
Location: Bay Area, CA (Alameda)

iTrader: (6)

From what I heard, the battery in our remotes are rechargeable and it only charges when it's in the ignition of your car.

I'm not sure if your problem is with the main key or the secondary key, but whatever key you use less frequently, just put it in the ignition of your car for awhile. I'm not sure if you have to be driving or not...