sounds like they want you to pay his property damage. Tell them to F off. Sounds like it was mostly his fault for failing to yield the right of way. Tell them if they pursue the property damage claim, you'll file your personal injury claim, that you have otherwise been willing to forgo. If they insist on pressing a property damage claim, contact your insurance carrier. Odds are that between your auto policy, and/or your homeowner's policy you'll have liability coverage for any claim they make against you.