[tturbonegro]

Doors aren't unlocking untill you hit the button like 5 times and have to be real close so I'm assuming the battery is dead..
What size battery does it take and what's a good way to pop the key open?

Thanks

[CycleX3]

Unfortunately, there's no replaceable battery. The battery charges when in the ignition so it sounds like your core is nearly dead. I had the same issue and had to get a new key. It set me back $250.

[mletchworth]

You can open up the key fob with an razor knife. Here's a video. I tried it once, but wasn't very successful. I think there was something else wrong with my key though.

http://www.youtube.com/watch?v=e1o9vH3mgmg

[cleung]

tischer bmw sells the keys for $150 if I remember right

[ngcreese]

Try cleaning your key's metal blade with alcohol or paint thinner. Over time a thin layer of varnish seems to build up on the blade and (seems) to prevent the inductive key charger from operating normally.

[tturbonegro]

Thanks guys