VW Auxiliary Water Pump - Pierburg 5Q0121599AA

Product Information

An engine auxiliary water pump is a component in a vehicle's cooling system that helps circulate coolant to the engine, heater core, and supporting systems leveraging coolant like the turbocharger. It is particularly useful in systems where additional coolant flow is needed to maintain optimal operating temperatures, especially during low-speed driving or when the engine is idling.

• Overheating Engine: If the auxiliary water pump fails, it can lead to inadequate coolant circulation, causing the engine to overheat, especially in stop-and-go traffic or under heavy loads
• Coolant Leaks: A malfunctioning pump may develop leaks due to damaged seals or housing, resulting in visible coolant pooling under the vehicle
• Inconsistent Cabin Heating: If the pump is not circulating coolant properly, the heater may produce inconsistent or insufficient heat, leading to cold air blowing from the vents

About Pierburg

Pierburg S.A. is a company that forms part of the KSPG AG Group, a worldwide leader in the design, development and production of automobile components. As a worldwide automotive provider, Pierburg S.A. holds a position as a leader in the automotive markets thanks to their competence in the areas of the reduction of emissions and secondary air management. The development of our products is carried out in close collaboration with well-known automotive manufacturers.

With a history beginning with the start of the automobile industry, Pierburg’s reputation has been that of superior engine expertise. Pierburg remains a pioneer in advanced pump technology working as an OEM (original equipment manufacturer) for many European auto brands. Their product line ranges from coolant pumps, oil pumps and re-circulating water pumps, to vacuum pumps and many more. For every function, Pierburg produces a solution that provides the highest reliability, dependability, and functionality for automobiles.

Even before the talks of climate change, Pierburg had been working on finding solutions for ecological friendly vehicle technology, in order to slow fuel consumption and decrease emissions. One example is Pierburg’s line of on-demand oil and water pumps only run when needed resulting in reduced engine emissions.