BMW 3-Series (E90 E92) Forum - View Single Post - Lost my primary key fob on NYE backups battery dead

Jonny550 · 01-06-2012, 08:56 AM

Guys you could replace the battery yourself, Their is a little trap door in the back of the key holding the battery. Pop it open then go buy the same battery at best buy. This is what i did so dont spend $100-200-500 on a key when its a $5 fix.

BTW the car does not charge the key thats a myth that nobody can prove.

01-06-2012, 08:56 AM	#8
Jonny550 Brigadier General 269 Rep 4,936 Posts Drives: 2012 550i Xdrive Join Date: Feb 2009 Location: Jersey Shore iTrader: (14)	Guys you could replace the battery yourself, Their is a little trap door in the back of the key holding the battery. Pop it open then go buy the same battery at best buy. This is what i did so dont spend $100-200-500 on a key when its a $5 fix. BTW the car does not charge the key thats a myth that nobody can prove. __________________ [SIGPIC][/SIGPIC] .
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