bcworkz said:
You may need to reinitialise all your keys to get that one working again, the flat battery may have caused the security codes to be corrupted.
It is possible to ruin a battery by completely discharging it to 0 output, but seems unlikely in your case.
Thanks.. that was exactly it!
I went for a 3 hours drive.. and the remote function still didnt work
Followed this thread:
http://www.z4-forum.com/forum/viewtopic.php?f=2&t=20569
1. Turn key to position 1 five times very quickly
2. Remove key
3. Hold unlock button then press lock button 3 times, release unlock button.
4. If you have another key do the same button pressing within 30 seconds
5. Turn on ignition to finalize
Which made my old key work... but then i didnt do it for the spare working key and that stopped working!!
So i did it again for both keys and now i have 2 fully functioning keys