Plot hole: There is no reason for there to be sinks in the bathrooms. The cars may be able to use sinks just as they use toilets, but in the bathrooms they are too small and too inaccessible for any use.
Cars 2 (2011)
1 plot hole
Directed by: John Lasseter, Brad Lewis
Starring: Michael Caine, Owen Wilson, Emily Mortimer, Larry the Cable Guy
Continuity mistake: When Holly and McMissle are convincing Mater to complete the mission, his door panels change between the shots facing the two and then facing Mater.
Finn McMissile: My apologies, I haven't properly introduced myself. Finn McMissile, British intelligence.
Mater: Tow Mater, average intelligence.
Trivia: During the last race in London, Lightening passes by a sign that is advertising Lassetyre. That is a shout out to John Lasseter one of the directors of the movie.
Answer: They heard him recording the message to Finn and found his words suspicious.