How can I check how much warranty is left on a used car?

Start with the in-service date and current odometer reading, then compare them to the brand's warranty terms for that model year. The easiest way is to call or visit a franchised dealer for that brand and ask the service department to look up the VIN; they can see the in-service date, remaining coverage and any open recalls. Ask the seller for service records too. On OffLot, the Open lot mode checklist reminds you to ask about remaining warranty before you buy.