In Transformers (2007), the yellow Autobot who becomes Sam Witwicky’s car is Bumblebee.
Bumblebee arrives on Earth in the form of a worn yellow 1977 Chevrolet Camaro and forms a bond with teenager Sam Witwicky. After Sam purchases the car, Bumblebee reveals that he is a transforming alien robot and helps protect Sam from the Decepticons.
The film updates Bumblebee’s appearance during the story: he scans a newer 2007 Camaro, giving the character his familiar modern look. Although he is an Autobot warrior, the movie presents him as a loyal companion who communicates through radio clips because his voice processor is damaged.
Bumblebee was already a major character in the Transformers toy and animated universes before the live-action film. The 2007 movie also established him as a central screen character, later leading the 2018 spin-off Bumblebee.