Change a8 d3 keyfob battery to fix no key identified remote lock unlock smart key 

2010 A8L - Simple change of the battery worked for me. No need to program or reset. Thanks

Do you know how to reset the key changing battery didn’t help mine.

Isn't it a 2023 battery and not a 2032. Or did they change it on later model A8s?

I used my key earlier this morning. It worked. About 1 hour later I go to leave and my key fob wont unlock my car. I had to have my wife come get me. I bought a new battery and even though you were able to change the battery and didn’t have to sync. For some reason my 2004 Audi A8 won’t start. What else can I do?

Thank you!!!