Audi TT Key Fob Battery Issues, Easy DIY Fix Alert

Having some experience working on cars, I dealt with a similar issue on my 2006 Audi A4. The electronic key symptoms were exactly the same, intermittent operation and dashboard warnings about low voltage in the key fob. The fix was straightforward, a key battery replacement solved the problem completely. I went to a local workshop since I wanted to make sure the battery type was correct and properly installed. The total cost was 37 Euro, which included the new battery and labor. The dead key battery is a common issue that typically shows these symptoms: Inconsistent locking/unlocking, Having to press buttons multiple times, Key needs to be very close to work, Dashboard warnings about key battery Before suggesting more specific solutions, could you share: Have you noticed the range getting progressively worse? Does the physical key blade still work normally? Are you using the original key or a replacement? Do you have a spare key showing the same issues? This information would help determine if its truly just a battery issue or potentially something else requiring attention.

Thanks for the detailed response about key batteries. My mileage is currently at 192102KM, and the symptoms keep getting worse. The key fob range has definitely decreased over the past few weeks, I now need to be right next to the car for it to work. The physical key blade works fine for manual unlocking, and this is my original key. I do have a spare key that still functions normally, which makes me think the low battery warning is accurate. Will try replacing the key battery first since its a relatively cheap fix compared to other potential issues.

Thanks for the additional details. Based on your symptoms and my prior experience with the same issue on my Audi A4, I'm now even more convinced this is a classic case of a low key battery. The gradually decreasing range you described matches exactly what I experienced before replacing my auto key battery. The fact that your spare key works normally and the physical key blade functions properly are strong indicators that the key fob electronics are the issue, not the cars central locking system. This perfectly aligns with the low battery warning on your dashboard. When my electronic key started failing, I also noticed the same pattern, having to stand closer and closer to the car until eventually being practically next to the door for the keyless access to work. Some practical tips from my repair experience: Get a quality replacement battery, Clean the battery contacts when replacing, Test the key several times after replacement, Keep your spare key with good battery as backup The decreasing range combined with a working spare key strongly suggests you wont need expensive repairs, a simple car key battery replacement should resolve these symptoms.

Thanks for the advice. Just wanted to update the thread, I went ahead with the key fob battery replacement yesterday. Total cost was 35 Euro at a local shop and it fixed the problem completely. The key now works perfectly again from a normal distance. Really glad it was just a simple battery issue rather than something more complex with the electronic system. Looks like the dashboard warning about low key battery was spot on. For anyone searching the forum later with similar problems, definitely try replacing the fob battery first if youre experiencing decreased range and intermittent operation. Could save you a lot of time and money compared to more extensive repairs.