The Bosch Tune-Up Kit - 471902 is a comprehensive kit of products designed to improve the performance and maintenance of a car. It includes various essential components that are necessary for a complete tune-up of a vehicle. The kit includes an air filter, spark plugs, and a fuel filter, which are crucial for maintaining proper air and fuel flow to the engine. It also contains an oil filter and engine oil, which are essential for keeping the engine running smoothly and preventing wear and tear. Additionally, the kit includes a cabin air filter, which helps to improve the air quality inside the car by filtering out dust and other pollutants. The final component of the kit is a fuel system cleaner, which helps to remove any build-up or deposits in the fuel system, ensuring optimal performance. This Bosch Tune-Up Kit is a convenient and cost-effective solution for keeping a car in top condition.