Toyota , mom had a new Avalon touring edition, super nice car, turbo 6 cylinder, 2009, took it to the dealership for all maintenance, then one day I was driving it and it locked up, wouldn't even turn the key over, cometo find out after intense investigation by their insurance and Toyota, and another auto care company, a baffle inside the valve cover came looses and got lodged in the dohc gear, causing the engine to lock up and send an emergency signal to the CPU telling it to shut down completely.
During the past decade or so, some auto maintenance companies were switching to rubber nozzles on overhead oil supply lines with drop down auto reels from steel rigid ones. Evidently the dealership hadn't done that and knocked a baffle loose and destroying the engine.
My dad being a partner with a large auto care company caught the Toyota lawyers attention, long story short, Toyota tried sue my parents and say they caused the damage when service records clearly showed the dealership did it and not my dads shop.
Well my parents won the case and we now boycott Toyota! What a bunch of .... nevermind.