[delinka]

> the procedure requires a module produced and sold by the manufacturer

So now the manufacturer has yet another method of extorting would-be mechanics. You'd have to regulate pricing or aggressively prosecute attempts at anticompetitive tactics.

> in case the manufacturer ceases to exist...

And who goes to jail when the company folds and, in the fire sale, the master key is on a system that gets wiped when being transferred to the new owner? Key escrow sounds like a better idea to me. Perhaps legislation should specify the creation of a public agency, or maybe we could leave it to private competition.

As for the remainder of your points, I believe you're thinking in the right direction.