21648716 Compatible Water Pump — Volvo FMX

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 ensuring a continuous flow of coolant, it prevents overheating and maintains stable thermal management during heavy-duty operation in demanding environments.

Vehicle and engine compatibility

This component is compatible with Volvo FMX models, specifically those equipped with D11K engines, including variants such as the 330, 370, 410, 430, and 450. It is also fitted to Volvo FM series trucks such as the FM 330, FM 370, FM 410, and FM 450.

Installation and maintenance

For workshop technicians performing engine maintenance, it is recommended to inspect the pump housing and impeller during routine service. When replacing this unit, it is often practical to check associated belt components to ensure long-term system integrity. Consult your authorized distributor.

Troubleshooting and inspection

Monitoring for signs such as coolant leaks from the weep hole or unusual bearing noise can help prevent sudden engine temperature spikes. Regular inspection ensures the cooling system remains reliable under heavy commercial loads.

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 21648716.