The 06H 121 601M auxiliary water pump is mainly used in many models under the Volkswagen Group, including brands such as Audi, Volkswagen, Porsche, Bentley, Lamborghini, SEAT, and Skoda.

Although the car water pump has a simple structure, it is the power source for the engine cooling system and is crucial to the engine’s health. Understanding its function, working principle, and common faults helps car owners to identify potential problems in a timely manner and perform proper maintenance, thus avoiding major issues and protecting the expensive engine.