The car in Pulp Fiction is quite significant. It's often a symbol of status and power for the characters. For example, Vincent and Jules' cool rides show their confidence and a bit of their 'badass' nature in the criminal underworld they inhabit.
The car is also a part of the movie's aesthetic. It adds to the overall cool and gritty feel of the film. The classic cars used give a sense of the time period and the type of characters who would drive such vehicles. They are an important part of creating the unique atmosphere of Pulp Fiction.
The car in Pulp Fiction represents mobility and freedom within the context of the movie. It allows the characters to move from one place to another, which is crucial for the various plotlines that are spread across different locations in the film.