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<h2><span style="font-size: 18px;">Symptoms of bad 4WD actuator</span></h2><p><span style="font-size: 14px;">The main signs of a faulty 4WD actuator include difficulty engaging the 4WD system, where the indicator light may flash or stay on, as well as intermittent 4WD functionality that results in inconsistent traction. Unusual noises like grinding or whirring when shifting between 2WD and 4WD can also indicate an issue with the actuator. Dashboard warning lights, reduced fuel efficiency, and problems switching between drive modes are additional symptoms. If you experience any of these problems, it's best to inspect the 4WD system and determine if the actuator needs to be replaced.</span></p><h2><span style="font-size: 18px;">How to replace the 4 WD actuator?</span></h2><ol><li><span style="font-size: 14px;">Start by positioning the vehicle on a level surface and engaging the parking brake. Disconnect the negative battery cable to prevent any electrical complications during the repair work.</span></li><li><span style="font-size: 14px;">Identify the location of the 4WD actuator, which is typically situated in proximity to the <a href="https://a-premium.com/transfer-case-assembly">transfer case</a> or front <a href="https://a-premium.com/differential">differential</a>. Unplug the electrical connector(s) from the actuator, then proceed to detach it by unfastening the mounting fasteners. This process may necessitate the removal of additional components to facilitate improved accessibility.</span></li><li><span style="font-size: 14px;">Install the replacement 4WD actuator by positioning it in the proper orientation and securing it with the appropriate mounting hardware. Reconnect the electrical connector(s) to the new unit.</span></li><li><span style="font-size: 14px;">Restore the electrical connection by reattaching the negative battery cable.</span></li><li><span style="font-size: 14px;">Activate the 4WD system and verify its proper functionality, including the operation of the corresponding indicator light.</span></li><li><span style="font-size: 14px;">Conduct a road test to ensure the 4WD system is functioning correctly and there are no lingering issues.</span></li></ol><h2><span style="font-size: 18px;">Powerful performance, unbeatable value - A-Premium 4WD actuator</span></h2><p><span style="font-size: 14px;">The A-Premium 4WD actuator is a great choice for your vehicle's four-wheel drive system. This actuator is well-made and built to last. Its sturdy construction can handle off-road use. The best part is the excellent value - you get high quality at an affordable price. Whether you need to upgrade your 4WD or replace a worn part, the A-Premium 4WD actuator is a smart, cost-effective solution that will keep your 4WD working smoothly. You can count on reliable 4WD performance with this superior actuator from A-Premium. Alongside our 90-day free returns and 2-year warranty, you can count on our customer service team to be there for you 24/7. You can believe the 4WD performance with this actuator from A-Premium.</span></p>

4WD Actuator

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Air Cleaner

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Air Filter Box

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Mass Air Flow Sensors/Car MAF Sensors | A-Premium

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

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Auxiliary Water Pump

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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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.

1990 Toyota 4Runner 4WD Actuator

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