 The model is nicknamed Bug, therefore the term "buggy".The Beetle platform chassis was used because the rear engine layout improves traction, the air-cooled engine avoids the complexities and failure points associated with a water-cooled engine, the front suspension was considered cheap and robust and the spare parts from Volkswagen were cheap and readily available.Dune buggies with glass-reinforced plastic (fiberglass) bodies come in many shapes and sizes.