> GPS is a bad example, but there are things that pose a physical threat to others that we maybe shouldn't tinker with. Like I think some modern cars are fly-by-wire, so you could stick the accelerator open and disable the breaks and steering. If it's also push-to-start, that's probably not physically connected to the ignition either.

I'm not seeing an argument here.

Cars have posed a physical threat to humans ever since they were invented, and yet the owners could do whatever the hell they wanted as long as the car still behaved legally when tested[1].

Aftermarket brakes (note spelling!), aftermarket steering wheels, aftermarket accelerator pedals (which can stick!), aftermarket suspensions - all legal. Aftermarket air filters, fuel injectors and pumps, exhausts - all legal. Hell, even additions, like forced induction (super/turbo chargers), cold air intake systems, lights, transmission coolers, etc are perfectly fine.

You just have to pass the tests, that's all.

I want to know why it is suddenly so important to remove the owners right to repair.

After all, it's only been quite recent that replacement aftermarket ECUs for engine control were made illegal under certain circumstances[2], and that's only a a few special jurisdictions.

What you are proposing is the automakers wet dream come true - they can effectively disable the car by bricking it after X years, and will legally prevent you from getting it running again even if you had the technical knowhow to do so!

---------------------------

[1] Like with emissions. Or brakes (note spelling!)

[2] Reprogramming the existing one is still legal, though, you just have to ensure you pass the emissions test.