The Bosch Fuel Injector Kit - 472690 is a comprehensive kit designed to service the fuel injection system of a car. It includes a variety of products that work together to ensure the proper functioning of the fuel injectors, which are responsible for delivering fuel to the engine. The kit includes various components such as o-rings, seals, and gaskets, which are essential for creating a tight seal and preventing fuel leaks. It also contains specialized tools for removing and installing fuel injectors, as well as cleaning solutions to remove any buildup or debris that may be affecting their performance. This kit is designed to provide all the necessary components and tools for a thorough and efficient fuel injector service, ensuring optimal engine performance and fuel efficiency.