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There is no battery inside the key to replace. The key actually charges through your ignition. If its not functioning you will just have to order a programmed key from the dealership.
By sticking your key in the door lock and turning.
Use you key to unlock the doors.
According to my owner's manual you must contact a BMW dealer to replace the key.
yes
How do you replace a key battery on a 2004 Saab 93
most likely it's a dud battery in fob. Easy to replace, just prise open fob. Keep a spare battery somewhere as I have been locked out by a dud battery!
The keys that BMW provides are sealed...they make them that way so you have to go to the dealership to buy a new one. I followed this diy (link below) and it worked for me on my 2001 325Ci coupe.
use a hammer..:)
By using your key to unlock the door.
There is no battery in the key fob just take it to the dealer with all the keys u have from the x and they reset them togther...
be careful when u change the battery take off the key of the switch.