Character Analysis
The repo men are Joe's worst nightmare. These two guys (Larry J. Blake and Charles Dayton) are trying to track Joe Gillis's car down and repossess it. Although they're not major characters in the film by any means, they do play an important role in getting the movie's action started.
First, they pester Joe about the whereabouts of his car—he claims it's in the garage, but it isn't. After failing to get the money he needs to pay off the car, Joe ends up in a car chase with the repo men. He pulls into Norma Desmond's driveway, and the movie gets into its main conflict from there.
Oh, and later on, they do repossess Joe's car, which has the effect of making him even more dependent on Norma.