Key Remote stopped working
 

The lock button on my key just stopped working. I now have to manually insert the key to lock the car. I can unlock the car using the remote, and open the hatch, but not the lock function. Any ideas? Do I need to replace the key, or go to dealer for repair??

one of the most common problems of x5....i've been through your situation already....i went to the dealer to get my key activated so many times but it was still acting up i even bought a brand new key for 200+ bucks....the best solution i did was to install a nice aftermarket alarm/remote start....works pretty well =)