OE number 16100-39555 16100-09525 is for Toyota and Lexus engine water pump assemblies. This part is typically used in engines equipped with a 4.6L V8 (1UR-FE) engine.

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.