Along with Consumer Reports’ list of the most reliable cars on sale in the US is its list of the most unreliable models, and they’re basically all American.
The extensive Consumer Reports survey of car owners measures small annoyances (eg. rattles), ease of use problems (bad infotainment systems), and major problems (eg. transmission and all wheel drive repairs).
Here it is, counting down to the least reliable on sale in the US from least worst to plain worst.
Source: Consumer Reports
