AISIN Engine Coolant Thermostat THM-011 with Gasket — OE-Matched Fit for Infiniti/Nissan/Mitsubishi, Precise Opening Temp

AISIN THM-011 is an OE-matched engine coolant thermostat with gasket engineered to restore proper coolant flow and maintain the correct operating temperature in compatible Infiniti, Nissan, and Mitsubishi vehicles.

This thermostat is manufactured by AISIN to match original equipment specifications for form, fit, and function. Built from high-grade materials and tested to meet the OE specified opening temperature, the THM-011 replaces worn or failing thermostats to help the engine reach and hold its designed temperature quickly and reliably. The kit includes the thermostat plus the required O-ring/gasket for a clean seal at installation.

How does this thermostat affect engine warm-up and temperature control?

The thermostat regulates coolant flow between the engine and radiator so the engine warms up efficiently and stays within its intended temperature range. A properly functioning thermostat reduces cold-run wear, supports consistent heater output, and avoids overheating caused by a stuck-open or stuck-closed valve.

• OE-specified opening temperature for predictable operation
• Precision valve action to control coolant circulation
• Gasket included to prevent leaks at the housing
• Manufactured from durable materials for long service life

Will this AISIN thermostat fit my vehicle and how do I confirm compatibility?

The THM-011 is compatible with many Infiniti, Mitsubishi, and Nissan models, but fitment depends on year, engine, and specific model variants. Always verify compatibility using your vehicle’s VIN or the fit checker on the product page before ordering to ensure the correct part for your application.

• Compatible brands include Infiniti, Mitsubishi, and Nissan
• Common fits: FX45, FX50, M45, M56, Q45, Q70/Q70L, QX56/QX70/QX80
• Mitsubishi examples: Diamante, Eclipse, Galant, Montero, Outlander
• Nissan examples: Armada, NV2500/3500, Pathfinder, Titan

What are the advantages of choosing an AISIN OE-matched thermostat?

AISIN designs thermostats to replicate factory performance, ensuring the same opening temperature and mechanical fit as the original part. That means fewer installation issues, predictable thermal management, and compatibility with your vehicle’s cooling system components and control strategies.

• OE match for reliable form, fit, and function
• High-quality materials to resist corrosion and wear
• Includes O-ring/gasket to ensure a proper seal on installation
• Manufactured by an established OEM supplier with rigorous quality control

How should I install and maintain the thermostat for best results?

Installation is straightforward for anyone comfortable with basic cooling-system service: drain coolant to a safe level, remove the thermostat housing, replace the old thermostat and gasket with the AISIN unit, then refill and bleed the cooling system. Inspect hoses and coolant condition while the system is open and replace any brittle hoses or contaminated coolant to prolong thermostat life.

• Drain coolant to below the housing before removal
• Replace the old thermostat and fit the provided O-ring/gasket
• Refill with the manufacturer-recommended coolant and bleed air pockets
• Check surrounding components—hoses, housing, and sensors—during service

Who is this for: The AISIN THM-011 thermostat kit is intended for mechanics, DIY enthusiasts, and fleet technicians who need an OE-spec replacement for compatible Infiniti, Nissan, and Mitsubishi models. It suits anyone replacing a failed thermostat, restoring proper engine temperature control after cooling system work, or performing routine maintenance where OE fit and dependable thermal response are required. Always confirm vehicle fitment with the product fit checker or your VIN to ensure this thermostat matches your engine configuration.