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The 2005 Toyota Corolla's idle air control valve can be found inside the throttle body and is in charge of regulating the engine's idle speed. An indication of a faulty idle air control valve is inconsistent idling speed. A properly functioning idle air control valve ensures smooth idling in your vehicle. However, if the valve malfunctions, idling will become rough, causing noticeable vibrations when your vehicle is stationary with the engine on. The average cost to replace an idle air control valve ranges from $120 to $500, with parts typically costing between $50 and over $400, and labor totaling about $70.
The idle air control valve for a 2005 Toyota Corolla can be found inside the throttle body.