Ducati has been working hard over the years to change public opinion about the brand’s reliability. Whereas older Ducatis would require frequent maintenance of its desmodromic valves, newer Ducati models have extended that service interval farther and farther. While it’s a step in the right direction, Ducati’s eighth place ranking on this list isn’t doing the brand any favors, with 33% of Bologna’s finest experiencing a problem that could lead to “failure” before its fourth birthday.