Bosch Idle Air Control Valve

The Bosch Idle Air Control Valve (also called an IAC valve, idle speed control valve, or idle air control motor) regulates the amount of air that bypasses the throttle plate when the engine is idling. By managing this airflow, it helps the engine control unit keep idle speed steady during cold starts, warm-up, and changes in electrical or accessory load.

Key Features:

• Controls bypass air at idle to help maintain smooth, stable engine speed
• Built to the quality and durability standards expected from Bosch, a long-standing OE supplier to automakers worldwide
• Precision-engineered internal components for accurate, consistent response to engine control unit commands
• Designed to help restore proper idle quality when the original valve becomes sluggish, sticky, or fails
• Suitable for replacement of worn or carbon-fouled valves

Common Signs of a Failing Idle Air Control Valve:

• Rough, surging, or unstable idle
• Engine stalling at idle or when coming to a stop
• Idle speed that is too high or too low
• Hard starting or difficulty maintaining idle when the engine is cold
• Check engine light with idle control related codes

Replacing a worn idle air control valve with a Bosch unit helps bring back dependable idle performance and drivability. Select the specific part number below for the exact configuration you need.