A car dealer isn't legally obliged to provide a warranty. But it's always telling when a seller is hesitant to provide any meaningful level of aftersales protection because it suggests that the car is on its last legs. Personally, I wouldn't buy a car without a minimum of a three-month warranty (or six months if the car costs in excess of £3,000)

All car dealers and traders are bound to the Consumer Rights Act 2015, which is detailed here: www.honestjohn.co.uk/how-to-reject-a-car-your-cons.../