"Accident liability. Are you responsible if your car is at fault in a crash, or is your car's AI?"
It doesn't really matter, you will just have an insurance policy which will pay out for the damage caused by your car. Firstly, insurance should be massively cheaper when self driving cars become universal due to the reduced accident rate. Secondly any manufacturers who have accident prone cars will have the insurance rates hiked right up until they either fix the issue or go out of business. Market economics will determine reliable self-driving cars. Same will happen with manufacturers liability insurance.