Ignition Key not Found

I get a sporadic alarm while driving that "ignition key not found, car may not be able to be started"


What causes this? Is it the battery in the remote not having sufficiently charged?
Is it an intermittent fault in the ignition wiring?

I would replace the battery in the key fob first (I believe most of them are replaceable and can't be recharged)

Originally Posted by gregb

I would replace the battery in the key fob first (I believe most of them are replaceable and can't be recharged)

Here is a good thread for DIY replacement of the battery in the key fob for a car with comfort access.
http://www.bimmerfest.com/forums/sho...hlight=key+fob