So you didn't have it done as you previously claimed, the prior owner did and he probably filed the complaint before the expiration or maybe he was buying a new $40,000 4Runner and made that part of the deal. And your buddy negotiated the repair as part of his willingness to buy the car - again, not a special favor. You can claim all you want that the dealer did someone (unclear who) a favor but they flat out didn't unless it was for a large fleet buyer (previous owner of yours maybe) and they sucked up the cost to preserve the relationship. They didn't sink $1600 into an individual buying cheap used vehicles unless it was a condition of the sale (which means they made a lot more than $1600 on the sale).