21969187 Volvo FMX III Water Pump

What does a water pump do?

This water pump serves as a critical component within the engine cooling system, responsible for circulating coolant between the engine and the radiator. By maintaining steady fluid flow, it prevents overheating and ensures the engine operates within its designed thermal range, even under heavy-duty service conditions.

Compatible Volvo vehicles

This component is specifically designed to fit a wide range of Volvo heavy commercial vehicles, including the FMX III (330, 370, 380, 410, 430, 450, 460) and FMX II models. It is also compatible with various Volvo FM series trucks such as the FM 330, FM 370, FM 410, and FM 450 models.

Maintenance and installation

For optimal performance, technicians should inspect the pump during routine belt service. Common signs of wear include coolant leakage from the weep hole or unusual noise from the bearing assembly. Replacing the pump alongside the timing or alternator belt is recommended to prevent unexpected downtime.

Troubleshooting guidance

Ensure proper fitment by verifying compatibility with your specific engine configuration. Check the compatibility list for your vehicle's exact requirements.

OE cross-reference

525.03.0009 (Water Pump Water Pumps) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21969187.