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Audi concert sound system volume control faulty

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Problem is due to the microprocessor that runs the whole show, or more precisly a part of it that
remembers the volume level you had set when you removed the key, this memory is call EEPROM,
(electrically erasable programable read only ymemor), it can remember its data without power being applied,
this type of memory had a limited number of write cycles( number of times it can be re -written lets say between 20-50,000)
the early concert radios would only write to this memory when the radio was switched off, so that equates to 2-3 times a day in normal use, later radios have a software bug that writes(updates) this memory EVERY time you alter the volume level, you will quickly use up the 50,000 write cycles and the memory becomes defective, the symptoms are full volume that cannot be controlled, and it will be temperature sensitive often improving when it warms up.
Shame on you AUDI, this product was defective from manufacture but you dont honour any player out of warrenty, EEPROM has limited write cycles any engineer knows this, your software is defective.

the fix is to replace the microprocessor that has 1. new EEPROM onboard & 2. new software that doesnt weat it out!...the bad news is this fix is way more that the cost of a used radio off EBAY

Posted on Apr 25, 2009

  • SKYamw May 25, 2011

    I bought my car in 2004 my Audi Concert system gave out on me in 2008 and I was inform to buy another from dealer. So I did so which cost me $215.00 for the brand new system. installation of course cost me more. In 2010 my new system conked out on me. I took my car to a mechanic thinking maybe its an electrical problem and he stated nope its the systems volume thats not working and that it would cost me way more to fix the system if I have it repaired than to buy a new radio. So I am out of two car stereo systems and have to find something to replace and pray to god that whatever I buy does not mess up my electrical system. Ugh. Oh by the way another defective problem that I had was with the power windows in 2008. The windows began to go up and down very reluctantly then eventually they did not work. I was told they need new motors which cost over $500.00 for both to be replaced. Come to find out I went to another Audi dealer who informed me that its not the motors I just need to replace the clips that holds the window in place. The original clips where defective and they had broke and that this is common. I replaced the clips with new ones that where not the same and so far no problems.

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