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<h2>What is an engine auxiliary water pump?</h2>
An engine auxiliary water pump, also known as a secondary water pump or electric water pump, is a handy device in a car's cooling system that helps regulate the engine's temperature. It's like a backup pump that works alongside the main water pump to ensure the engine stays cool and doesn't overheat.
An auxiliary water pump is electrically powered and operates independently of the engine speed. It continues to circulate coolant even when the engine is off, providing extra cooling when it's needed most. The auxiliary water pump comes into play in situations where the engine requires additional cooling support. For instance, when you're stuck in traffic or idling for an extended period, the main pump alone may not be able to circulate enough coolant to keep the engine temperature within the desired range. That's when the auxiliary pump kicks in, ensuring the coolant flows properly to dissipate heat effectively.
<h2>Auxiliary water pump failure symptoms</h2>
When an auxiliary water pump starts to fail or malfunctions, it can exhibit several symptoms that indicate there may be a problem.&nbsp;You may notice:
<ul>
<li>Engine overheating: The engine may start to overheat, as indicated by a rising temperature gauge or warning message.</li>
<li>Reduced cooling system efficiency: Engine temperature may rise quickly or fluctuate erratically due to inadequate cooling.</li>
<li>Lack of cabin heating: Reduced or no heat output from the vents when the heater is on.</li>
<li>Unusual noises: Grinding, rattling, or whining sounds coming from the pump area.</li>
<li>Coolant leaks: Puddles of coolant under the vehicle or a sweet odor from the engine bay.</li>
</ul>
<h2>Auxiliary water pump vs water pump, what are the differences?</h2>
The auxiliary water pump and water pump are two distinct components with different functions in a vehicle's cooling system. The main difference between an auxiliary water pump and an engine water pump lies in their functions and how they operate within the vehicle's cooling system
Function
<ul>
<li>Engine water pump: Circulates coolant throughout the engine, cylinder heads, and radiator to maintain optimal engine temperature.</li>
<li>Auxiliary water pump: Provides supplemental coolant circulation and assists the primary water pump in specific situations to prevent engine overheating.</li>
</ul>
Power source and operation
<ul>
<li>Engine water pump: Mechanically driven by the engine, using a belt or chain connected to the engine's crankshaft.</li>
<li>Auxiliary water pump: Electrically powered and operates independently of the engine speed, controlled by the vehicle's ECU or a separate control module.</li>
</ul>
Usage
<ul>
<li>Engine water pump: Operates continuously whenever the engine is running to ensure consistent coolant flow and regulate engine temperature.</li>
<li>Auxiliary water pump: Used in specific situations like idle or low-speed conditions, or when additional cooling is needed to support the primary water pump.</li>
</ul>

Auxiliary Water Pump

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Air Filter Box

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Air Flow Sensor

Air Intake Duct

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Air Intake Hose

Air Intake Manifold Actuator Control Solenoid

Air Intake Manifold Flap Adjuster

Air Intake Manifold Runner Control Sensor

Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

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Intercooler

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Oxygen Sensor

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Pressure Sensor

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Throttle Body

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Camshafts

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Engine Valve Cover

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Belt Tensioner

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Engine Oil Dipstick Tube

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Oil Cooler Line

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Oil Filter

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Oil Filter Housing

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Oil Level Sensor

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Oil Pan

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Oil Pump

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Oil Pump Pickup Tube

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Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

Engine Valve Covers & Ignition Coils Kits

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Ignition Coil

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Intake Manifold Repair Kit

Engine Components & Accessories

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Expansion Tank Mounting Plate

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Fuel Cooler

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Radiator

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Temperature Sensor

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Turbo Hose

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Water Outlet

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Engine Cooling

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EGR Valve

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Secondary Air Injection Check Valve

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Vapor Canister Vent Solenoid

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Exhaust & Emission Systems

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Fuel Line Kit

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Fuel Tank Strap

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High Pressure Fuel Pump

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Idle Air Control Valve

Mechanical Fuel Pump

Oil Pressure Relief Valve

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Fuel Systems & Components

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The engine comprises many essential elements such as the lower cylinder block, upper cylinder head(s), and the cooling & lubricating systems. With A-Premium aftermarket engine components, you can expect that your engine deliver years of reliable performance. We offer a diverse selection of engine components from air filters and ignition coils (kits) to fuel pumps to cater to your needs.

Volkswagen Auxiliary Water Pump