Lemons

The Lemons are the main antagonists of Cars 2. They are an international criminal organization (mostly from the United States and a few Eastern European countries, likely Serbia and Ukraine) composed of four families: Gremlins, Pacers, Hugos and Trunkovs. "Lemon" is a term used to describe a defective car, which is true for all members.

Official Description

"Jalopies, rust buckets, clunkers. For too long, the Lemons have been mocked for their odd designs and unreliable engines. Now, the Lemons want power and the respect that comes with it. To achieve their goal, they want to discredit Sir Miles Axlerod's new alternative fuel, forcing cars to buy oil from the Lemons. They're willing to destroy any car that parks in their way. And let's not forget the masterminds behind their plot. . . ."

—Official Bio , Meet the Cars