Otherwise, what's the point in buying a self-driving car? If I have to monitor it every second to make sure it's not crashing, why even bother? People bring up aviation, but it's not the same, the pilot is always involved to some extent, better trained than most drivers, and if there's a problem with the auto pilot there's usually plenty of time for the pilot to take over and make corrections. Not so on a crowded roadway.
Obviously they can't build the entire cost into the purchase price, so I'd think they'd give one year free coverage and then charge the customer beyond that. Of course, that would depend on all systems being functional, so maintenance becomes an issue. I expect at first these cars will only be leased so manufacturers can keep tight control of them.