Part number 16100-B9026 typically refers to an engine water pump assembly for specific Toyota and Perodua models (such as Toyota Agya, Toyota Wigo, Perodua Axia, and Perodua Bezza).

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.