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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 systemFunction<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 Cleaner

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Air Filter Box

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Air Flow Sensor

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Air Intake Duct

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Air Intake Hose

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Air Intake Manifold Actuator Control Solenoid

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Air Intake Manifold Flap Adjuster

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Air Intake Manifold Runner Control Sensor

Air Intake Resonator

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Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

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Intake Manifold Flap Actuator

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Intake Manifold Repair Bracket

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Intake Manifold Runner Control Valve

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Intercooler

Intercooler Hose

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Oxygen Sensor

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Pressure Sensor

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Supercharger Pulley Drive Unit

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Supercharger Snout Rebuild Kit

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Throttle Body

Throttle Cable

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Throttle Position Sensor

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Turbocharger

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Turbocharger Gasket Kit

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Turbocharger Oil Line

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Vacuum Pump

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Air Filters & Intake Systems

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Camshaft Adjuster

Camshaft Adjuster Cover

Camshaft Kit

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Camshaft Timing Gear

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Camshafts

Chain Tensioner Adjuster

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Cylinder Head

Cylinder Head Assembly

Eccentric Shaft Actuator

Engine Timing Belt

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Engine Valve Cover

Engine Valve Cover Gasket

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Harmonic Balancer

Rocker Arm

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Rocker Arm Shaft Lifter Assembly

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Timing Belt Kit

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Timing Chain Gear

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Timing Chain Kit

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Timing Cover

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Timing-Control Valve Solenoid

Valve Cover Gasket

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Valve Lifter Guides

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Valve Lifters Tappet

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Cams, Timing & Valvetrain

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Belt Tensioner

Coolant Level Sensor

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Crank Installer Tool

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Crankcase Breather Hose

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Crankcase Breather Valve

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Crankshaft Position Sensor

Crankshaft Pulley

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Engine Oil Dipstick

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Engine Oil Dipstick Tube

Engine Oil Filter

Engine Oil Pan Gasket

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Flywheel

Harmonic Balancer Crankshaft Hub

Knock Sensor

Oil Baffle

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Oil Cooler

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Oil Cooler Line

Oil Drip Pan

Oil Filler Cap

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Oil Filter

Oil Filter Base

Oil Filter Cover

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Oil Filter Housing

Oil Filter Housing Cover

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Oil Level Sensor

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Oil Pan

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Oil Pump

Oil Pump Drive Gear Shaft

Oil Pump Pickup Tube

Oil Separator

Serpentine Belt

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Cranks, Pistons, Oil & Components

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Camshaft Position Sensor

Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

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Electronic Ignition System

Engine Valve Covers & Ignition Coils Kits

Glow Plug

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Glow Plug Relay Module

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Ignition Coil

Ignition Coils & Spark Plugs & Wires Kits

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Ignition Coils & Spark Plugs Kits

Ignition Coils & Wires Kits

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Ignition Distributor

Ignition Lock Cylinder

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Ignition Starter Switch

Ignition Switch Actuator

Kill Switch

Knock Detonation Sensor

Relay

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Spark Plug

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Spark Plug Wire

Electronic Control Modules, Ignition & Distributors

Engine Wiring Harness

Intake Manifold Repair Kit

Pulley

Engine Components & Accessories

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Active Grille Shutter Actuator

Drive Motor Inverter Cooler

Electric Engine Water Pump

Engine Coolant Air Bleeder Valve

Engine Coolant Pipe

Engine Coolant Shut Off Valve

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Expansion Tank

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Expansion Tank Mounting Plate

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Fan Pulley Bracket

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Fuel Cooler

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Overflow Hose Connector

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Radiator

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Engine Cooling

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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 Phaeton Auxiliary Water Pump