Idle Air Control (IAC) Valves

The idle air control (IAC) valve is located on the throttle body of fuel-injected engines, where it works with the vehicle’s ECU to electrically regulate airflow to the engine to ensure smooth idling. We manufacture Idle Air Control Valves at our ISO/ TS16949-certified facilities in Greenville, SC, and Reynosa, Mexico, respectively. A key aspect of the manufacturing process is the load testing, which makes sure each actuator delivers a greater force than actual load.


  • Tested at greater than normal force to extend longevity
  • Anodized aluminum housing resists wear and tear from corrosion
  • iac1jpg

    Precision-machined housing ensures proper air flow to engine as required by ECU during changing load requirements 

  • iac2jpg

    Anodized aluminum housing resists corrosion better than regular passivation treatment 

  • iac3jpg

    Precision-machined solenoid components generate magnetic force to actuate plunger 

  • iac4jpg

    High-temp polyester coating on solenoid coil wire ensures proper function during cyclic exposure to elevated temperatures 

A Sweet Spot Category

According to our research, more than 70 million vehicles (model years 1995 through 2005) on the road today have entered “sweet spot” years for IAC repairs, which means they have an IAC that will need to be replaced soon. Choose high-quality Intermotor® Idle Air Control (IAC) Valves to take advantage of this growing repair opportunity.

A Sweet Spot Category

Designed and Tested to Prevent Corrosion

The OE idle air control valves are prone to corrosion due to harsh environmental conditions. To make sure our SMP-manufactured IACs last, we give them an anodized coating that is thicker and more robust than the OE coating. As you can see from the results of our salt-fogging test below, our coating withstands corrosion better than the OE:

Designed and Tested to Prevent Corrosion

Installation Spotlight: IAC Tech Tips

In this Installation Spotlight, our master technician provides some helpful tips to consider when replacing an Idle Air Control Valve.