21218878 Volvo FMX FM Water Pump

What does a water pump do?

This water pump is a critical component within the engine cooling system, responsible for circulating coolant between the engine and the radiator. By maintaining consistent fluid flow, it prevents engine overheating and ensures stable thermal management during heavy-duty operations.

Compatible Volvo truck models

This specific unit is compatible with Volvo FM models, including the FM 300, 340, 360, 380, 390, 400, 430, and 480 variants. It is also designed for fitment in Volvo FMX series trucks such as the 400, 440, and 480 models.

Maintenance and installation

For optimal performance, technicians should inspect the pump housing and impeller during routine maintenance. It is recommended to check for signs of coolant leakage or bearing noise during every belt service interval to prevent unexpected downtime in construction or transport applications.

Troubleshooting guidance

Ensure the correct fitment by verifying the engine code and checking the compatibility list before installation to maintain system integrity.

OE cross-reference

525.03.0006 (Water Pump Water Pumps) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 21218878.