The Bosch Fuel Injector Kit - 471859 is a comprehensive set of products designed to service the fuel injector system of a car. It includes various components that are crucial for maintaining the proper functioning of the fuel injector system. The kit contains a fuel injector cleaner, fuel injector seal kit, fuel injector o-rings, and fuel injector connectors. These products work together to clean and lubricate the fuel injectors, replace worn out seals and o-rings, and ensure a secure connection between the fuel injector and the fuel line. This kit is essential for keeping the fuel injector system of a car in top condition, which can improve fuel efficiency, engine performance, and overall vehicle reliability.