Mater says that his line of work is towing and salvage. Finn replies by saying, "Right. And Ms. Shiftwell's is designing iPhone apps." This is a reference to Apple's smartphone line. In the short YouTube documentary A Day in the Life of John Lasseter, it is shown that during the end of production of Cars 2, Professor Z's lines in the interrogation scene with Rod "Torque" Redline were changed to remove any references to radiation ("electro-magnetic pulse" was originally "blast of radiation"). John Lasseter asked that the lines be changed out of respect for Japan, due to the Fukushima Daiichi nuclear disaster that happened there three months before the film's release in the United States, which it was caused by the 2011 Tōhoku earthquake and tsunami. However, in the Cars 2 Junior Novelization and the Cars 2 magazine, "blast of radiation" was used, probably because they were made before they changed the line. It took a long time for the team to decide the emotional center of the film. Notably, Doc Hudson's death was envisaged as the emotional center of the film, as he could be considered as Lightning and Mater's father, but this idea was finally abandoned, and Lightning and Mater's friendship was retained.

Ebert, Roger (June 22, 2011). "John Lasseter plays with his cars". Sun-Times Media Group. Archived from the original on October 9, 2022 . Retrieved October 9, 2022.

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First Russian Formula One driver Vitaly Petrov dubbed the character named in his honor from animated film Cars 2 by Disney/Pixar.

In the bathroom scene: When Mater enters the bathroom, none of the stalls are open except the one he goes into. When Rod "Torque" Redline comes in, they are all open except the one Mater is in. There is only about 15 seconds in between Mater and Rod "Torque" Redline, so it is very unlikely that all the cars had exited their stalls by then. However, it could be that the cars exited their stalls when Mater sees the toilet and before he went into his stall, as well as that when a mini blue car exits the stall Mater goes into. a b c d Barnes, Brooks (October 17, 2011). "John Lasseter of Pixar Defends Cars 2". The New York Times. Archived from the original on April 2, 2015 . Retrieved December 2, 2011.

The first character seen in the movie, Leland Turbo, and the last character seen in the movie, Siddeley, are both voiced by Jason Isaacs.

Flo says "Go get 'em tiger" to Lightning McQueen. This could be a reference to Mary Jane Watson's known quote to Spider-Man. It was originally planned that the World Grand Prix would be composed of five races rather than three, but two of them were removed because it was too much story to tell. The movie was also supposed to open in Prague, but Lasseter moved it to the ocean and the oil rigs, which he though would be a much more spectacular way of debuting the film and to announce its spy theme.In Cars 2, Carla Veloso is the only female racer in the World Grand Prix. Similar to how Misti Motorkrass was the only female racer in the Piston Cup.