20921947 Compatible Water Pump — Volvo FMX

What does a water pump do?

This water pump is a critical component of the engine cooling system, designed to circulate coolant between the engine block and the radiator. By maintaining consistent thermal management, it prevents engine overheating during heavy-duty operations. The unit is engineered with high-strength components to withstand the intense thermal and mechanical stresses typical in commercial vehicle environments.

Compatible Volvo vehicles and engines

This part is specifically compatible with Volvo FMX models including the 370, 410, 430, and 450 variants equipped with D13C engines. It also fits various Volvo FM series trucks such as the FM 330, FM 370, FM 410, and FM 450. These components are essential for maintaining optimal operating temperatures in heavy commercial vehicle applications.

Maintenance and installation guidance

For proper maintenance, technicians should inspect the pump housing and seals during every coolant service. It is recommended to check for signs of leakage or bearing noise. When replacing this component, it is often efficient to inspect related belt-driven parts to ensure the entire cooling loop remains functional.

System reliability

Maintaining a stable temperature profile is vital for engine longevity. Using a high-quality replacement ensures that the impeller and shaft assembly continue to provide steady flow rates under load.

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 20921947.