The Zimmermann Brake Kit - Front/Rear - 138469 is a comprehensive kit of products designed to service the brakes on a car. It includes six different components, each designed to improve the performance and functionality of the brakes. The kit contains a set of front and rear brake pads, which are essential for creating friction and stopping power when the brakes are applied. It also includes a set of front and rear brake rotors, which are the discs that the brake pads press against to slow down the vehicle. Additionally, the kit includes a set of front and rear brake sensors, which detect when the brake pads are worn and need to be replaced. These sensors help ensure that the brakes are always in optimal condition for safe driving. Overall, the Zimmermann Brake Kit - Front/Rear - 138469 is a comprehensive and essential package for maintaining the brakes on a car.