The throttle body controls how much air enters the engine, using a valve that opens wider as you press the accelerator — on most modern vehicles, this is managed electronically rather than by a physical cable. A dirty or failing throttle body commonly causes a rough or fluctuating idle, hesitation on acceleration, stalling, or a check engine light tied to airflow or throttle position codes. Browse replacement throttle bodies for cars, trucks, and SUVs to restore smooth, responsive throttle control.
