Arteon Key Fob Failure: Remote Access Dead at 13k

Had the same signal interference issue on my 2020 VW Passat 2.0 TSI. The car radio and remote key symptoms matched exactly, no remote unlock response and required physical key insertion. The antenna mount in the front bumper was indeed the culprit. Water had seeped in through a damaged seal, corroding the antenna connection points. The entire antenna replacement was necessary since the component showed multiple failure points during testing. When diagnosed properly, fixing this took about 3 hours at the shop. The radio signal problems disappeared completely after replacing both the antenna unit and its connecting harness. This is a known weak point requiring proper waterproofing during installation. The repair needed specialized VW diagnostic equipment to properly code the new antenna module. Without proper coding, the car radio and key fob systems can show persistent errors. While not a critical safety issue, it should be addressed soon to prevent potential immobilizer system complications. Consider having a certified VW technician check the antenna diagnostics first before attempting any repairs. The error codes should point directly to the faulty antenna connection if that is indeed the source of the problem.

Thanks for confirming the antenna replacement fixed your signal interference problems. Really helps knowing the car radio and key fob issues were sorted with the same repair. The symptoms on my Arteon match exactly what you described. Quick follow up, do you remember roughly what the car antenna repair cost you? Also curious if youve had any recurring signal problems since the fix? Want to budget properly and make sure this will be a permanent solution before booking it in.

After getting my automotive antenna fixed at the certified shop last month, I can confirm it solved all signal interference issues completely. The repair was cheaper than expected at 95€, which covered fixing a faulty cable connection in the antenna mount system. No recurring problems since then, both the remote key and car radio work perfectly now. The mechanic explained the original issue was indeed just a damaged connection in the front bumper antenna assembly, not a complete unit failure like they initially suspected. They were able to repair the existing component rather than doing a full antenna replacement, which saved significant cost. Worth noting that proper waterproofing was done during the repair to prevent future corrosion issues with the antenna mount. If your symptoms match what I experienced, this should be a permanent fix for your signal problems too. The diagnostic equipment confirmed everything is working at factory spec now.

Just had the car antenna checked at my local certified shop. Turned out the front bumper antenna mount was completely corroded, worse than I expected. The mechanic showed me where water had gotten in and damaged not just the connector but the whole assembly. Total repair came to 320€ which included a new antenna unit, proper waterproofing, and diagnostic testing. More than I hoped but less than I feared after my last mechanic quoted nearly double without even checking the actual issue. The signal interference problems are completely gone now. Remote key works perfectly again, and even noticed the car radio reception is much clearer. Really glad I asked here first, saved me from another questionable repair experience and helped me understand exactly what needed fixing. Think the lesson learned is to get these antenna issues checked early before water damage makes them worse. Will definitely keep an eye on the seals around the antenna mount area during future maintenance.