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<h2>What does a throttle body&nbsp;do?</h2>The throttle body acts as a valve between the air intake system and the engine's intake manifold. It controls the flow of air into the engine. When you press the accelerator pedal, the throttle body opens, allowing more air to enter, which in turn increases engine power. Inside the throttle body, there is a throttle plate that can rotate. When you press the accelerator, it opens to allow more air in. Releasing the accelerator causes the throttle plate to close, reducing the airflow.The throttle body plays a crucial role in controlling the engine's idle speed. When the vehicle is at a standstill or moving at low speeds, the throttle plate may be partially closed to limit the amount of air entering the engine. This helps maintain a stable and efficient idle.&nbsp;By adjusting the position of the throttle plate, the engine control unit (ECU) can regulate the air-fuel mixture to optimize performance and fuel efficiency. When you need more power, the throttle plate opens wider to allow more air for combustion.<h2>How to clean a throttle body?</h2><h3>Tools needed:</h3><ul><li>Screwdriver or socket set</li><li>Throttle body cleaner</li><li>Clean cloth or paper towels</li><li>Safety glasses and gloves</li></ul><h3>Steps:</h3><ol><li>Safety Precautions:</li></ol><ul><li>Ensure the engine is cool.</li><li>Wear safety glasses and gloves.</li><li>Disconnect the battery.</li></ul><ol start="2"><li>Locate the Throttle Body: Find it between the air intake hose and the intake manifold.</li><li>Remove Air Intake Tube: If needed, detach the air intake tube to access the throttle body.</li><li>Inspect and Clean: Use a throttle body cleaner to spray and clean the throttle plate and interior surfaces. Wipe away residue with a cloth.</li><li>Reassemble: Reattach the air intake tube and reconnect the battery.</li><li>Start and Test: Start the engine and take it for a test drive to ensure smooth operation.</li></ol>Remember to use a cleaner designed for throttle bodies and avoid abrasive materials.

Throttle Body

Air Cleaner

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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

Air Intake Resonator

Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

Intake Manifold Flap Actuator

Intake Manifold Repair Bracket

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

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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Radiator

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Radiator Control Fan Module

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Radiator Core Support Skid Bar Plate

Radiator Fan Cooling Motor

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Radiator Hose

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Radiator Support Assembly

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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.

2003 Toyota Sienna Throttle Body

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