21221878 Volvo FM and FMX Water Pump

What does a water pump do?

This water pump is a vital component within the engine cooling system, designed to circulate coolant between the engine and the radiator. By maintaining steady fluid flow, it prevents overheating and ensures the engine operates within its intended thermal range under heavy-duty service conditions.

Vehicle compatibility and fitment

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 fitted to Volvo FMX trucks such as the 400, 440, and 480 models. This part serves as a reliable replacement for Volvo OE-standard components.

Installation and maintenance

To ensure proper installation, technicians should inspect the drive belt and associated pulleys during replacement. It is recommended to check for signs of leakage or bearing noise during routine maintenance to prevent sudden system failure.

Troubleshooting guidance

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

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 21221878.