My 2006 Prius is making a tapping sound before I start it and then again after I turn it off. When I took it to the dealership for diagnosis, they said the sound was coming from the brake actuator, but it didn't impact the brake performance. I opted not to replace that expensive part and just deal with the noise. A week later the red brake light came on as well as the ABS and the other brake light (!). None of these lights were on before. Is this something new or not? Not sure if I trust the brakes now. Would it be safe to drive back to the dealership?