21781059 Water Pump for Volvo FMX D11B Engines

What does a water pump do?

This water pump serves as a critical component within the engine cooling system, facilitating the continuous circulation of coolant between the engine block and the radiator. Built with high-strength components, it is engineered to withstand the rigorous thermal and mechanical stresses typical of heavy commercial vehicle operation.

Vehicle and engine compatibility

This specific unit is designed for Volvo FMX models featuring the D11B engine, as well as Volvo FM series including FM 330, FM 370, FM 410, and FM 450. It ensures precise fluid movement to prevent overheating during intensive duty cycles.

Maintenance and inspection

For optimal performance, technicians should inspect the pump housing and seals during routine cooling system maintenance. It is recommended to check for signs of coolant leakage or unusual noise from the bearing assembly during scheduled belt replacements to ensure long-term reliability.

Selection guidance

Consult your authorized distributor to confirm exact fitment for your specific engine configuration.

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 21781059.