Part number 16100-19235 GWT-91A is a Toyota engine water pump assembly, primarily used in Toyota Land Cruiser and Coaster models equipped with 1HZ and 1HD series diesel engines.

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.