Comment by scuol
The manufacturer obviously, but they can sell the car in the first place because this defect risk is quantifiable for their liability insurance provider, who can evaluate how risky said car company is in terms of their manufacturing and how likely it is they'll need to pay out a claim, etc.
For self-driving, that evaluation is almost impossible. Sure it can look good statistically, but for things like brake lines, brake pad material, brake boosters, etc, they are governed by the laws of physics which are more understandable than any self-driving algorithm.
I think with Waymo we're probably at the point where an insurer could have decent stab at what their liability would be if asked to cover AI-related accidents. In fact, given that these cars are on the road and have reportedly been in accidents, I would imagine this is past being a hypothetical concern and now well into the territory of 'solved problem'.