Inspect for Loose Fuel Cap and Tighten or Replace as necessary Replace Mass Air Flow Sensor Looking over the list of top finishers, a theme is apparent. These are older models with simpler drivetrains. Top models are longer-running models that have been well sorted by their manufacturers. Or, they are earlier naturally aspirated versions of current vehicles that pre-date current complex turbocharged powertrains. This suggests that there is a penalty in the reduction of headache-free driving in the move to the current generation of hybrid-electric and direct-injected, turbocharged drivetrains. “Having a reliable vehicle to drive and reducing the likelihood of costly car repairs is particularly important as we wrap up 2020 – a year that has brought many challenges,” said David Rich, CarMD’s technical director. “CarMD publishes this annual report to help vehicle owners and used car shoppers make better-informed buying and service decisions, and to encourage drivers to seek repairs when the check engine light comes on.”