Audi A3 Child Lock Fault (2021 / 8Y) – Rear Door Lock Replacement Fix

Audi A3 2021 (8Y) child lock fault? This video shows the real cause and the fix. If you’re getting a child lock fault message or issues with the rear door locking/unlocking, the problem is often the rear door lock mechanism itself. In this video, I diagnose the fault and show the rear door lock replacement to fix the issue properly. This is a common fault on newer Audi A3 models and can be intermittent or permanent. 🔧 Symptoms you may have: Child lock fault message on the dash Rear door not opening from inside Central locking issues on one door Full step-by-step diagnosis and repair shown in the video. #audia3 #audia38y #carfault #cardiagnostics #mechanic #automotive #repair #doityourself