hi all sorry if this has allready been asked my key fob works to unlock but not lock if i remove the back and replace it will let me lock once nut not again after that unless remove the back again i tired to replace the battery but lost all lock and unlock put old battery back in same again is there a way to resync the key after a battery replace or does it have to be recoded   c

Hello Clifford,

There may be an issue with the micro switch/es on the key fob, and if so, that would have to sorted before any re syncing. EBay has been a source of replacement micro switches for some makes, or complete fob assemblies. 

There are a number of suggested procedures for re syncing remotes - some requiring one working fob, and you should find theses via. a Google search. You may be luckier than me, but I tried most of them without success, when I’ve tried to re sync. my spare fob, but you may have better luck. If not, then it will be a matter of getting the fob reprogrammed at an Audi dealer or an independent specialist. 

Kind regards,

Gareth. 

yh i have only got the one key and been looking on ebay for a new key to swap the boards but cant find one to match