7. 2006/07 and 2012 to 2015 Dodge Ram HD
The 2500 and 3500 series Dodge Ram that they built between 2006 and 2007 and from 2012 to 2015 are famous for a series of problems. In fact, in that period, Dodge trucks were subject to several big recalls, so be aware of that and search online to see the exact models they recalled. Often, these big trucks suffer AC and heater failure, but it doesn’t end there. Transmission problems, drivetrain issues, steering, and brakes are all known to be problematic.
Some years are better and some are worse, so it all depends on recalls and component installation, as well as the mileage of the exact truck. Models with lots of miles and hard life can develop issues with the suspension and driveshaft. If you take a test drive and find a vibration or noise coming from underneath the truck, avoid purchasing that vehicle.