Maybe we should require a basic automotive systems class in high school. Perhaps that would help with trusting their mechanics and certainly would make them more competent shoppers.
I am not talking about everyone, The ones I am referencing are obvious.

Sadly, insurance rates and mis-funded schools took auto-shop out of most schools here in California !! I agree that there should be a FEW basic classes:

Automotive Systems: Know how an engine, transmission, and electrical system work. Basic servicing. Basic troubleshooting.

Fiscal Math: How to balance a checkbook. Understanding interest and payment plans. The importance of saving, and the dangers of credit.

Home Survival: How to cook, clean, and do laundry. Change a light bulb, fuse, and troubleshot basic home appliances.

OOPS, I learned all those things at HOME from parents !! YES I think it would be nice for them to have the knowledge… but those damned teachers unions !!