Hepu AP8379 Auxiliary Water Pump 12V Electric Coolant Pump

The Hepu AP8379 Auxiliary Water Pump (also called a secondary coolant pump or auxiliary electric water pump) keeps coolant moving in a secondary circuit of the cooling system. It works independently of the engine-driven mechanical water pump, so coolant keeps circulating even when engine speed is low or the engine is off.

Key Features:

• Electric operation, 12V
• Cross-references to OE number 3QF 965 567
• Electronically controlled operation that does not depend on engine speed
• OE-matched electrical and hydraulic specification
• Coolant-lubricated brushless motor
• Compact housing for tight engine bay installation
• Manufactured by Hepu, a German water pump specialist, to OE standards

Auxiliary pumps support start-stop systems, turbocharged engines and cabin heating circuits, where a mechanical pump alone cannot provide continuous coolant flow. A failing auxiliary pump can cause rising coolant temperatures or weak cabin heat, so replacing it with an OE-quality unit helps restore reliable thermal management.