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<h2><span style="font-size: 18px;">What is a timing belt?</span></h2>
<p style="text-align: justify;"><span style="font-size: 14px;">A timing belt coordinates the engine's valves and pistons. It links the crankshaft to the camshaft(s), ensuring proper valve timing for efficient combustion and power. The belt also transmits power to the camshaft(s), enabling correct valve operation. Replacing the belt at recommended intervals is crucial to prevent engine damage and maintain reliable performance. A timing belt kit contains the necessary components to replace the timing belt and sustain proper engine synchronization.</span></p>
<h2><span style="font-size: 18px;">When should a timing belt be replaced?</span></h2>
<p style="text-align: justify;"><span style="font-size: 14px;">Timing belts are a mission-critical engine component that necessitates routine swapping to avert expensive damage. The standard guideline is to substitute the timing belt every 60,000 to 100,000 miles, though the precise mileage can fluctuate based on the vehicle's make and model. It's essential to adhere to the manufacturer's directives outlined in the owner's manual, as failure to swap the timing belt as preventative upkeep can precipitate major engine issues down the line.</span></p>
<p style="text-align: justify;"><span style="font-size: 14px;">Factors like severe operating conditions, high odometer readings, and extreme temperatures can curtail the lifespan of a timing belt. For this reason, it's frequently also recommended to swap out associated components like the water pump when performing a timing belt service, since the labor is already involved. Maintaining vigilance on this crucial maintenance is indispensable for safeguarding engine dependability and durability in the long haul.</span></p>
<h2><span style="font-size: 18px;">Timing belt replacement guide</span></h2>
<p style="text-align: justify;"><span style="font-size: 14px;">First, locate the timing belt at the front of the engine, disconnect the battery, and rotate the engine to the top dead center for the #1 cylinder, marking the belt's current position. Then, remove the old timing belt after loosening the tensioner, and inspect the <a href="https://a-premium.com/belt-tensioner">belt tensioner</a>, idler pulleys, and <a href="https://a-premium.com/water-pump">water pump</a>, replacing any worn components. Next, install the new timing belt, ensuring proper alignment with the marks made earlier, and properly tension it according to the manufacturer's specifications. Finally, reconnect the battery, start the engine, and inspect for proper timing and any fluid leaks.</span></p>
<h2><span style="font-size: 18px;">A-Premium: the complete timing belt solution for your peace of mind</span></h2>
<p style="text-align: justify;"><span style="font-size: 14px;">Simplify your next timing belt service with an A-Premium timing belt kit. This all-encompassing package provides almost everything required for a stress-free repair, including the premium replacement belt, specialized tools, and some associated maintenance components. By addressing all critical items in one convenient bundle, the A-Premium kit ensures your engine receives thorough preventative care. Utilizing the appropriate tools designed specifically for the task, you can complete the installation safely and efficiently, with the assurance that comes from knowing your vehicle is in capable hands. Additionally, our commitment to you extends beyond just a 90-day return window and a 2-year warranty - our customer service team is on hand 24 hours a day, 7 days a week to address your needs.</span></p>

Timing Belt Kit

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Air Filter Box

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

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

Intake Manifold Flap Actuator

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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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Throttle Position Sensor

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Turbocharger

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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

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Camshaft Timing Gear

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Camshafts

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Engine Valve Cover

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Harmonic Balancer

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Timing Chain Kit

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Timing Cover

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Timing-Control Valve Solenoid

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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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Crankcase Breather Hose

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Crankcase Breather Valve

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Crankshaft Position Sensor

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Engine Oil Dipstick Tube

Engine Oil Filter

Engine Oil Pan Gasket

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Flywheel

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Oil Cooler

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Oil Cooler Line

Oil Filler Cap

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Oil Filter

Oil Filter Base

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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

Cranks, Pistons, Oil & Components

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Camshaft Position Sensor

Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

Engine Valve Covers & Ignition Coils Kits

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Glow Plug Relay Module

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Ignition Coil

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Ignition Coils & Spark Plugs Kits

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Ignition Distributor

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Ignition Starter Switch

Ignition Switch Actuator

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

Engine Components & Accessories

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Auxiliary Water Pump

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Expansion Tank

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Expansion Tank Mounting Plate

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Fuel Cooler

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Radiator

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Radiator Hose

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Radiator Support Assembly

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Temperature Sensor

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Turbo Hose

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Water Coolant Pipe

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Water Outlet

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Engine Cooling

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Engine Mount

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Engine Mounts

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Catalytic Converter

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EGR Valve

Emissions Fluid Pump

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Exhaust Fluid Heater

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Exhaust Gas Temperature Sensor

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Exhaust Manifold

Fuel Tank Breather Valve

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Fuel Vapor Leak Detection Pump

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Nitrogen Oxide Sensor

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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 Filter

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Fuel Injection Control Module

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Fuel Injection Pressure Regulator

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Fuel Injector

Fuel Injector Kit

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Fuel Injector Module Wiring Harness

Fuel Line Kit

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Fuel Pump

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Fuel Sending Unit

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Fuel Tank Filler Neck Pipe

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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.

2003 Toyota Sienna Timing Belt Kit

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