Honda - Idle Air Control Valve 16022-PRB-A02 | 02–06 RSX Type-S / 02–05 Civic Si

Restore stable engine idle with this genuine Honda/Acura Idle Air Control Valve. The IAC valve regulates the amount of air bypassing the throttle plate while the throttle is closed, allowing the engine control unit to maintain the correct idle speed during startup, warm-up and changing accessory loads.

This OEM valve is listed for 2002–2006 Acura RSX Type-S models and 2002–2005 Honda Civic Si three-door manual-transmission models. Part number 16022-PRB-A02 replaces the earlier 16022-PRB-A01. 

What It Does

The idle air control valve helps:

• Maintain a steady engine idle
• Control airflow when the throttle is closed
• Increase idle speed during cold starts
• Compensate for electrical and air-conditioning loads
• Reduce stalling when coming to a stop
• Support smooth startup and warm-up operation

Common Symptoms of a Faulty IAC Valve

A worn, dirty or failing valve may cause:

• Surging or fluctuating idle
• Idle speed that is too high or too low
• Engine stalling at stops
• Difficult cold starts
• Unstable idle after releasing the throttle
• Check-engine light
• Poor idle when the air conditioning or electrical accessories are operating

These symptoms can also be caused by vacuum leaks, throttle-body contamination, wiring faults or other intake-system problems, so proper diagnosis is recommended before replacement.

Product Features

• Genuine OEM Honda/Acura component
• Part number: 16022-PRB-A02
• Supersedes: 16022-PRB-A01
• Direct replacement for compatible applications
• OEM electrical connector and mounting design
• Restores proper idle-air control
• Suitable for factory repairs and restorations

Vehicle Fitment

Common applications include:

• 2002 Acura RSX Type-S
• 2003 Acura RSX Type-S
• 2004 Acura RSX Type-S
• 2005 Acura RSX Type-S
• 2006 Acura RSX Type-S
• 2002 Honda Civic Si hatchback
• 2003 Honda Civic Si hatchback
• 2004 Honda Civic Si hatchback
• 2005 Honda Civic Si hatchback