He was voiced by Peter Jacobson.
Acer has always felt like an outcast in the car world. The beat-up green AMC Pacer joined forces with fellow “lemon” cars as henchmen for the devious Professor Z, whose clandestine mission is to wreak havoc at the highly visible World Grand Prix. Acer must hunt down the American and British secret agents who’ve stolen crucial information about Professor Z’s underhanded plot—his primary target just happens to be Mater, who’s been mistaken for a spy. Acer tries very hard to be a tough guy, but he’s over-eager compared to his no-nonsense accomplice Grem.
In the movie, Acer did everything his partner Grem was doing although he only watched the crashes in the races whereas Grem was actually working the camera beam. In Japan, Acer along with Grem attacked Rod Redline in the bathroom who passed along information about the conspiracy plot to Mater. Acer and Grem brought Rod to an abandoned warehouse where Rod was pumped with Allinol and Professor Z demonstrated the camera on him. Acer interrogated the agent and when he didn't fess up, watched as Grem killed him. Acer along with Grem arrived at Big Bently in London where Mater, Holley and Finn were trapped and about to be crushed by the clocks gears. When Mater discovered the bomb on his radiator and when McQueen chased him down to see what the situation was, Grem and Acer try to capture the two friedss only to be foiled by Holley Shiftwell who swoops down from the sky, sending the two lemons flying into Ye Left Turn Inn and as a result, Acer along with Grem get beat up by cars bigger and stronger than them. Acer along with Grem and the other lemons were then presumably arrested soon after.