The Aisin THN-012 thermostat delivers reliable, factory-grade temperature regulation for your engine’s cooling system. Manufactured in Japan by Aisin—one of the world’s leading OEM suppliers—this thermostat matches original equipment specifications for fit, function, and durability. Its precise wax-element design ensures consistent opening temperatures, stable coolant flow, and dependable performance in all driving conditions.

• OE-style construction: Built to the same standards as factory components for perfect fitment and reliable operation.
• Made in Japan: Precision manufacturing and strict quality control guarantee long-term durability and consistent temperature regulation.
• Accurate thermal response: High-quality wax element ensures the thermostat opens and closes at the correct temperature for optimal engine efficiency.
• Restores proper cooling performance: Prevents overheating and helps maintain ideal operating temps—critical for engine longevity.
• Trusted Aisin quality: Produced by one of the largest global OEM suppliers to Toyota, Nissan, Honda, and other manufacturers.

Notes

• Direct replacement thermostat; no modifications required.
• Always replace the thermostat gasket or O-ring when installing.
• Check coolant level and bleed air from the system after installation.