To be fair, my car has one specific circuit board that can only be fixed by a dealership mechanic. Found out about that one after it malfunctioned on the highway, my car turned off, and I couldn't use the breaks while coasting at 65 mph. I called half a dozen mechanics before one told me that it was a dealership issue because it required special equipment to code the circuit board. Wish my car told me that so I wouldn't have wasted all that time.