Top 10 Least Reliable Cars and Trucks

7. Ram 2500

It’s obvious the testers at Consumer Reports are not fans of heavy trucks. They’ve probably never had dirt under their fingernails or been at a construction site before. Their criticism of the Ram 2500 centers on refinement. According to them the pickup’s ride is harsh when unloaded, while the up-level Cummins turbo-diesel engine is raucous. Also, the truck’s six-speed automatic transmission does not shift smoothly. What do you expect? The Ram 2500 is a work vehicle not a Lexus ES350! Reliability of the diesel model is well below average, which is why this tough pickup is in a tough spot, on this top 10 list.