Large corporations are more likely to comply with a policy, so I think that would factor in to when and where policy is more effective than police, no?

What I don't understand about your point is that policy already makes stealing cars, murder, etc. illegal. What do you see as the difference between a policy that forces a car manufacturer to implement some technology that hinders theft vs. a policy that makes theft illegal?

I agree with you that the technology is probably beneficial on the whole and more effective than having police running around attempting to stop every car theft, but you're making this into a debate about policy vs. police, and I'm failing to make sense of how you distinguish one policy (regulating car manufacturing) from another (stealing cars is illegal).