As I described via various work orders to VW Centennial service since 05-15-2024 (5 service orders ago). I am seriously concerned about the sensor ability to prevent and effectively work when needed. Today, 02-26-2025 I am documenting a clear scenario where ACC failed. On Freeway 215 driving 60 MPG with ACC engaged. Traffic on the freeway came to a standstill, the ACC engaged and stopped my ID4 from 55 MPH. This is the ideal outcome. However it failed few moments later. ACC showed ready when at standstill. When traffic resumed, ID4 accelerated to commensurate with the traffic at 25mph and ACC kept on par with the car ahead which is intended with the ideal distance. 5 seconds later, cars stopped again. This is where ACC should have stopped my ID4. However it did NOT. ACC did not stop my ID4 only to find myself facing a red collision alert second later within car length away. Had to hit the brakes hard and swerve to avoid collision with the car in front. I was led into a false sense of security as ACC worked minutes prior. This is not the first time ACC failed, and based on my accounting, it only works ¾ times. Even failure to engage ¼ times this can result in a serious collision. Many times Ive discussed with the service asking them to replicate the same issue reported here. I also gave service exact scenarios where this happened. ACC also consistently fails 100% on highway off-ramps as the sensor ds not see off-ramp barriers. As such you can always find ID4 ACC accelerating into increasing elevation off-ramps. A clear example of such you is on Freeway 215 and 95 off-ramp. This is a severe safety flaw that is 100% reproducible that Ive explained to my service department time and again.