The Bosch Basic Glow Plug Service Kit - 485943 is a comprehensive kit designed for servicing the glow plugs in a car. It includes a set of four glow plugs, a glow plug control unit, a glow plug relay, and a glow plug socket. The kit is suitable for a variety of car models and is designed to provide a quick and easy solution for replacing faulty glow plugs. This kit is an essential tool for maintaining the proper functioning of a car's engine, as glow plugs play a crucial role in starting the engine and ensuring efficient combustion. With this kit, car owners can easily replace worn out or damaged glow plugs, ensuring their car runs smoothly and efficiently.