You are liable if the accident is your fault. On the other hand, if he sues you, all he can get is a judgment that is probably uncollectable if you do not own real estate, stocks or bonds.
If he can still file a claim, you might suggest that you reimburse him for any increase in premium if he files it on his insurance.
Also, if you own a car and have insurance, it might cover the loss. If he refuses to use his insurance (if he has converge for this), then both of you need to contemplate your relationship to each other, and, if you are believers, Jesus' instructions on the Sermon on the Mount that if someone wants to steal your shirt, give him your coat also.
If he follows this command, he will not ask you to pay for the car. If you follow this command, then you will pay for the car and not worry about the fact that he might have had insurance to pay for it. Morally, both of you are right and wrong. Legally, you are responsible.
Answered on Aug 23rd, 2012 at 3:55 PM