Off topic but regarding warranty work I'd like to add this:
A few cars ago when I had warranty work done on a recently bought new car, they must have given the work to a newby. The work involved replacing the heater core with disassembly of the dashboard needed. When I got the car back the mechanic at least had the courtesy to put the leftover screws in the gadget tray.
I get it now, some warranty work is delegated to new mechanics. For that I will either do it myself if possible, ignore the needed work if safe to do so, permit a new mechanic to do the work if failure of the repair appears inconsequential or else take a chance on a new mechanic. Before I take a chance on a new mechanic with an important warranty repair I will ask to talk to the person who will do the work.