I was in a Mazda dealer waiting for a checkup on my car and could overhear this young woman talking on her phone and to the service technicians. Her car had braked for no reason 3 times in the last few days and she was worried she would get rear ended if it kept happening. The mechanics did all sorts of test and drove her car around but couldn't find anything wrong. She had an 8 hour drive coming up and after exhausting other options decided to trade her car in on the spot for a new one! Extreme but at least her trade in wouldn't be considered defective.