The throttle valve (throttle plate) opens and closes to control how much air enters the engine, directly controlling engine power in response to the accelerator pedal.
For a throttle body, compare bore, mountings, connector and full part number. Resemblance to another unit for the same engine does not confirm its specification. Establish which accessories are supplied and whether adaptation is required. Cleaning the existing component and fitting a replacement are separate decisions that should follow diagnosis.
If you notice any of the following, the part likely needs replacement:
Rough or unstable idle
Hesitation or delayed response when accelerating
Check Engine light with a throttle-related fault code
Installation information
Bolts to the intake manifold with a gasket — a throttle relearn procedure is often required after installation on electronically controlled systems.
Frequently asked questions
Carbon deposits from crankcase gases and fuel residue collect on the valve and its bore, restricting airflow and preventing the valve from closing to its exact calibrated position, causing a rough idle.
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Ilmars K.
August 2026
★★★★★
I ordered a Heater Blower Motor Resistor for a Toyota Avensis. Delivery took eight days from Latvia to Ireland. I installed it, and everything works perfectly. I wish this company success.
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Toyota Avensis
August 2026
★★★★★
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June 2026
★★★★★
Super fast delivery of the part, and good quality of the used part. Thanks for the service.
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May 2026
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February 2026
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November 2025
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