Q: Audi A4 2003 B6 model.. I want to duplicate my remote key. and I looked the oem remote key on ebay. it says: Numbers inside are: 315 MHz 4D0.837.231.F FCC ID: MYT8Z0837231 PLEASE BE SURE TO MATCH THESE NUMBERS WITH YOUR CURRENT REMOTE OR CHECK WITH A DEALER TO MAKE SURE THIS WILL WORK. ----------------------------------------------------------------------- I tried to find the fcc ID number on my existing key, but I couldn't. THIS key on ebay will work for every key of audi a4? or only for matched key? link here http://cgi.ebay.com/ebaymotors/2002-2003-2004-2005-02-03-AUDI-A4-A2-KEY-REMOTE-QUATTRO_W0QQcmdZViewItemQQ_trksidZp1713Q2em153Q2el1262QQcategoryZ33723QQihZ006QQitemZ160258620862
A: Did you open your key head? The FCC ID# is in there right above the battery provision.