owner responses were used to compile the list of most and least reliable cars. among the most reliable, luxus topped the brand followed by toyota, audi, buick, hyundai, and mini. the least reliable brands, infinity, cadillac, ram, jeep, and at the bottom? fiat. ford moved up to no. 17 in reliability from 23rd last year, and the new f-150 scored above average. one big shock was that tesla motd e s luxury electric cars which testers called the best car they have driven, well 1400 owner responses, they disagreed as the owners listed problems with the tesla charging equipment, poorly built cars with squeaks and leaks and issues with the drive train. consumer reports no longer recommends the model s. new transmissions are causing problems for several car