I would go to a BMW DEALER, and ask to get a replacement mast only. I would then go to a junk yard and get the motor for the automatic electric antena. Many times the motors just sit around because the masts have snapped when infact the motors are fine. I've gone through 2 masts but my motor is fine. Keep the installed mast oiled well, and the motor is sure to last longer. Tip install the motor first, then follow instrustions which come with the mast to install the mast. Good luck