According to their boss Sir Miles Axlerod, the Lemons have felt rejected by the world because of their defects during the past, an event that left them feel unloved. The film, however, reveals little details regarding how their fellow cars treated them.
As such, Miles Axlerod formulates a plan that involves forcing the entire world to abandon alternative fuel and resorting to using oil (as he still owns the largest oil reserves in the world despite his claims that he has been converted into a hybrid). To that end, Axlerod created the World Grand Prix for racers around the world and a new alternative fuel called Allinol (which is actually gasoline engineered to ignite by an EMP beam). He also plans on murdering anyone who gets in their way.
Being in cahoots with Axlerod's plot and sharing the ownership of the oil reserves, several Lemon families conspired to aid Axelrod in his plan to sabotage the Grand Prix races. To that end, Axelrod gets his right-hand Professor Zündapp to create EMP weapons designed as Prix cameras to ignite any Allinol supply during the races. Because of this, the first two races in Tokyo and Porto Cosa were disasters as many racers engaged into crashes after getting their Allinol ignited by the EMP beams. To cover his tracks, Axlerod suspends on using Allinol for the third and final race in London, though Lightning McQueen stand firm on his decision to use Allinol. Because of this, Axlerod contacts Zündapp to murder McQueen during the final race. This was witnessed by McQueen's best friend Mater, along with two British agents Finn McMissile and Holley Shiftwell, who end up being captured and take hostage in Big Ben.
During the final race, Zündapp gets Grem and Acer to fire up their EMP beam on McQueen, but the latter escapes unharmed (due to Sarge switching McQueen's Allinol supply with Fillmore's organic fuel), just as Mater escapes to warn McQueen of the plot. Anticipating this, Axlerod arranges for Zündapp to place a bomb inside Mater's air filter so that he and McQueen would be killed by the explosion. As Mater runs off out of range, Zündapp ends up being chased by a freed McMissile, forcing the other Lemons to take action and catch McQueen. Though McMissile and Holley manage to defeat Zündapp, the other Lemons surround them in an intersection, preparing to wait for the imminent explosion to kill McQueen, Mater and the agents. Mater tries to talk the Lemons out of the plan by pointing out that it won't make them feel any better, but even though the Lemons agree with him, they still want him and his friends dead for their greed. Fortunately, McQueen brought in his friends from Radiator Springs to stop them, forcing the Lemons to surrender.
Mater eventually proceeded to expose Axlerod as the mastermind behind the plot by forcing him to deactivate the bomb within close range. With the plot exposed, the Lemons are arrested for conspiracy to commit crime, murder, attempted murder, and embezzlement.
Out of the 44 members listed here, at least 70% (31 out of 44) of all of the Lemons were arrested.
- Sir Miles Axlerod (leader, arrested)
- Professor Zündapp (second-in-command, arrested)
- Grem and Acer (lieutenants, fate unknown)
- J. Curby Gremlin (leader; arrested)
- Tyler Gremlin (fate unknown)
- Don Crumlin (fate unknown)
- Towga Gremlin (deceased)
- Stefan Gremsky (fate unknown)
- Samuel Gremlin (arrested)
- Jake Gremlin (arrested)
- Dennis Gremlin (arrested)
- Robert Gremlin (arrested)
- Sylvester Gremlin (arrested)
- Kai Gremlin (arrested)
- Tai Gremlin (arrested)
- George Gremlin (fate unknown)
- Oil Rig Lemon (deceased)
- Tubbs Pacer (leader; arrested)
- Max Pacer (arrested)
- Vincent Pacer (arrested)
- Florentino Pacer (arrested)
- Hamilton Pacer (arrested)
- Leonard Pacer (arrested)
- Petey Pacer (arrested)
- Ashton Pacer (arrested)
- Fred Pacer (deceased)
- Jerome Ramped (fate unknown)
- Victor Hugo (leader; arrested)
- Alexander Hugo (arrested)
- William Hugo (arrested)
- Larry Hugo (arrested)
- Peter Hugo (arrested)
- Cornelius Hugo (arrested)
- Ivan (arrested)
- Karl Haulzemoff (fate unknown)
- Vladimir Trunkov (leader; arrested)
- Petrov Trunkov (fate unknown)
- Tolga Trunkov (arrested)
- Boris Trunkov (arrested)
- Jonathan Trunkov (arrested)
- David Trunkov (arrested)
- Kevin Trunkov (arrested)
- Rick Trunkov (deceased)
Out of the five associates here, at least 20% (1 out of 5) of all the associates have died.
- Tony Trihull (deceased)
- 2nd Combat Ship (fate unknown)
- Muggsy Liftsome (fate unknown)
- Karl Haulzemoff (fate unknown)
- Sylvester (fate unknown)
- Though they are considered the darkest villains of the Cars franchise due to their willingness to commit murder, Mater sympathizes with them due to their troubled pasts and his experience of being laughed at himself because of his antics. That said, the narrative and Mater himself make it clear that it doesn't justify their crimes. Furthermore, even some of their more ruthless members agree that it wouldn't make them feel better, implying that they are killing people out of both greed and resentment, though they still proceeded with their crimes and attempts to kill Mater, McQueen, Finn and Holley regardless.
- Though, they seem to have problems with acquiring the parts they need to survive.