The S-Series was part of a family of compact cars from the Saturn automobile company. This was the first series of Saturn vehicles. The automobile platform, the Z-body, was developed entirely in-house at Saturn and shared very little with the rest of the General Motors model line. It implemented a spaceframe design, also seen on some Pontiacs, which meant that the side panels did not carry load and could use plastic pieces instead of metal. These polymer panels were dent-resistant-something that has remained a major selling point for Saturn. The S-series was sold from the fall of 1990 through the end of the 2002 model year, with redesigns in 1996/1997 and in 2000/2001.