Audi SQ8 Key Fob Failure Frustrates Owners

As someone with moderate experience working on cars, I had a similar issue with my 2017 Audi SQ7 last year. The symptoms matched exactly what youre describing, inconsistent keyless entry and unusual key system error messages. The problem turned out to be a dying fob battery in the car key. These key batteries typically last 2-3 years before needing replacement. When they start failing, the first sign is usually unreliable keyless operation since this feature requires more power than basic lock/unlock functions. Took it to a workshop where they diagnosed and replaced the auto key battery in about 15 minutes. Total cost was 37 Euro including the new battery and labor. The repair completely resolved all the key system issues. To help provide more specific guidance: Which key fob version do you have (there are different types)? Are you able to start the car normally? Does the problem occur with both keys if you have a spare? When did these symptoms first appear? This is usually a straightforward fix, but knowing these details would help confirm if your situation matches what I experienced.

Last service was at 122365 KM. After experiencing low voltage issues with my key fob, I swapped in a new battery from a local shop for 35 Euro. Fixed the problem right away. No more keyless access troubles or error messages since the key battery replacement. The car runs perfectly now.

Great to hear you got it sorted with a simple battery replacement! That matches my experience exactly, when my SQ7 had similar low voltage symptoms, replacing the fob battery resolved everything. The 35 Euro cost is pretty standard too, I paid just slightly more at 37 Euro. These key battery replacements really are a common fix for keyless access problems. When the voltage starts dropping, the first thing to go is usually the keyless entry function since it needs more power than basic operations. Good to keep in mind that most auto key fobs need a new battery every few years. Might be worth noting down the date of this battery replacement to anticipate when the next one might be needed.

Thanks for confirming that a new key battery fixed everything. The 35 Euro I spent at the local shop was definitely worth it to resolve those annoying keyless entry problems. I had been worried it might be something more serious with the car key system, but the low battery was the only issue. Since replacing the fob battery, all the error messages have disappeared and the keyless access works perfectly again. Good to know for future reference that when these symptoms start showing up, checking the key battery should be the first troubleshooting step. Planning to mark my calendar for 2-3 years from now when this replacement might need doing again.