I accidentally tossed out my 1993 Audi 100CS radio code
when getting rid of junk in the glovebox.
After changing my headgasket on the motor we reconnected the battery supply & found the radio on SAFE mode.
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In order to get the serial number from the radio you must remove it from the dash board. It will be a 14 digit number that starts with AUZ and it will be on the radio chssis tag. Take that number and the title or registration in your name to a dealership and make sure you have photo id and they should be able to get you the unlock code.
take it to the 4s garage, if you want to find out the problem by yourself,you first have some professional tool , there are some diagnostic that always can figure out the problem i can show you: www.xcardiag.com/
IMPORTANT NOTE: You must have the security anti-theft code for your Audi radio from the car manufacturer, or from an Audi dealer! You can find the radio code at: http://www.radio-code.co.uk/
The sequence of programming for 2001 Audi A3 radio is: 1. Push simultaneous "SCAN" and "RDS" keys until on the screen will appear "1000" displayed. 2. Release keys. No more push on "SCAN" and "RDS" keys because otherwise number "1000" will be considered as first safe code attempt. For example: we have the security code "5079". Then: 3. By the no.# 1 key you will set up the first safe code digit. Push 5 times on the no.# 1 button. The "5" number will be setted. 4. By the no.# 2 key you will set up the second safe code digit. Push 10 times on the no.# 2 button. The "0" number will be setted. 5. By the no.# 3 key you will set up the third safe code digit. Push 7 times on the no.# 3 button. The "7" number will be setted. 6. By the no.# 4 key you will set up the four-th safe code digit. Push 9 times on the no.# 4 button. The "9" number will be setted. 7. Then push again simultaneous "SCAN" and "RDS" keys for confirm this safe code. On the screen will be displayed "SAFE" notice. Release keys! For few seconds a radio frequence will be displayed. The radio is now ready for use!
Well if you are trying to unlock a factory Audi radio then its one thing but if it is an aftermarket radio such as an alpnine, pioneer, sony etc then it is a different approach. If it is a factory radio then u have to pull the radio out of the deck, write down the serial number off the back of the radio ( S/N or SER ) and then go to your windshield and take down your Vehicle Identification Number and head over to your Audi Service And Parts Dept, give them the info that you took down and they can pull up your unlock code for the radio, you can also call the Service/Parts Dept if the dealer is too far, but you definately need that info before u call them. If it is for an aftermarket it may have to be resetted or you may have to call the manufacturer tech support line to unlock it.