Description
This air thermal valve fits the Honda Acty Truck HA3, HA4 (1990-1999). It manages intake air routing by temperature to help cold-running and warm-up.
In Stock - ships from our California (USA) warehouse
Fast, reliable delivery - no overseas backorder wait.
Vehicle Fitment & Compatibility
Confirm your chassis code against the table below before ordering.
100% Fitment Guarantee
Not sure about fit? Add your chassis/VIN number at checkout and we confirm it before we ship. If a part does not fit your Acty, we exchange it or refund you in full.
Signs you need this air thermal valve
- Poor cold-start or warm-up behavior
- A rough idle until the engine warms
- A cracked or stuck valve
Features & Function
- Regulates intake air by temperature
- Correct valve for the Acty intake
- Smooths cold-running and warm-up
Installation Specifications
- Difficulty: Moderate.
- Estimated time: about 30 to 45 minutes.
- Required tools: A screwdriver and hose pliers.
Oiwa Garage Tech Note
"Check the vacuum hoses to the valve while you are in there - brittle, cracked hoses cause the same warm-up symptoms and are cheap to renew."
Frequently Asked Questions
How do I know this valve failed?
Poor warm-up and a rough cold idle that clears when hot point here. Confirm your vacuum hoses are intact too.
How do I know the air thermal valve is bad?
Poor cold running and a rough idle that clears once the engine warms point here. Check the valve and its vacuum hoses - cracked hoses cause the same symptoms and are cheap to renew.
Should I renew the vacuum hoses with this valve?
Yes - brittle, cracked vacuum hoses cause the same warm-up symptoms and are cheap, so renew them while the valve is out.
Fitment verified by the Kei truck specialists at Oiwa Garage · Listing updated June 2026.