Part numbers 16100-0H050, 16100-0H040, WPT-803, T2470, AW9414 are original equipment manufacturer (OEM) water pump assemblies used in Toyota and Lexus vehicles.

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.