Description

Function of the Idle Air Control Stepper Motor

The idle air control (IAC) stepper motor controls the amount of air bypassing the throttle plate at idle. By adjusting this airflow, it maintains a stable idle speed under varying loads (AC on, power steering, lights). A faulty stepper motor causes erratic idle, stalling when coming to a stop, high idle, and surging at idle.

Why order it from Partszar

A faulty sensor, coil or starter feeds the engine the wrong signal, so it runs rich, misfires, will not start or drops into limp mode, and the fault light stays on until it is fixed. Once this is replaced the ECU gets what it expects and the vehicle runs the way it did when it was new.

• Fitment checked before it is listed. Every part is cross-referenced against the official parts catalogue and OEM part number so it fits first time. If your vehicle is listed above, this is the one you need. Not sure? Send us your VIN using the contact form below and we confirm the exact part for free, no obligation.
• Dispatched fast, tracked to your door. In-stock parts leave within 1 to 2 business days and reach you anywhere in South Africa in 2 to 5 business days with tracking. Back-order parts are sourced directly from our supplier, typically 3 to 4 weeks, and we keep you updated by email.
• Honest about what you get. This is an aftermarket part, built to the original specification without the OEM logo on the casing, which is what keeps the price down.
• Decide with confidence. Selected parts carry our 6-month limited guarantee when fitted by an RMI-approved mechanic. Not sure about anything? Contact us below before you order.

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