AISIN Engine Coolant Thermostat with Housing THN-007 for Infiniti & Nissan — OE-Matched Fit, Durable Assembly

AISIN GENUINE THN-007 is a factory-matched engine coolant thermostat with housing engineered to restore proper engine temperature control for compatible Infiniti and Nissan vehicles.

This AISIN thermostat assembly replaces the original unit to deliver the correct OE-specified opening temperature, reliable operation, and precise fit. Built using OEM-grade materials and AISIN’s manufacturing standards, the THN-007 includes the thermostat and housing so you get a single, ready-to-install assembly. It’s intended for specific Infiniti FX35, G35, M35 and a number of Nissan Frontier, NV, Pathfinder and Xterra model years — always verify vehicle fitment before purchase.

How does this thermostat help my engine’s cooling performance?

The thermostat regulates coolant flow to maintain the engine at its designed operating temperature. Replacing a worn or stuck thermostat restores consistent temperature control, reduces warm-up time, and helps avoid overheating or overcooling scenarios that stress engine components.

• Opens at the OE-specified temperature for correct thermal management
• Factory-matched design ensures smooth coolant flow and sealing
• Durable materials reduce the risk of premature failure or leakage

Will the AISIN THN-007 fit my Infiniti or Nissan?

The THN-007 is manufactured to match original equipment dimensions and operating specs for the listed models. Fitment depends on year, engine, and vehicle options; confirm compatibility with your VIN or the seller’s fitment checker before ordering.

• Compatible with select Infiniti FX35 (2003–2005), G35 (2003–2007), M35 (2006–2008)
• Compatible with select Nissan Frontier (2005–2019), NV1500/NV2500/NV3500 (2012–2021/2020 ranges)
• Also fits select Pathfinder (2005–2012) and Xterra (2005–2015) applications

What comes in the package and what should I expect when installing?

The set contains the thermostat and its housing as a single assembly, reducing steps and potential gasket issues during replacement. Installation is straightforward for experienced DIYers and professional technicians; always follow vehicle service procedures and torque specs.

• Complete thermostat with housing included — no separate housing purchase required
• OEM-matched components for direct replacement and proper sealing
• Recommend replacing coolant and inspecting hoses when servicing the thermostat

Why choose AISIN over aftermarket alternatives?

AISIN produces components to OEM tolerances and specifications, leveraging decades of original equipment experience. Choosing an AISIN thermostat helps preserve factory performance and reduces the risk of mismatched temperatures, poor fit, or early part failure common with lower-cost knockoffs.

• Engineered to OE form, fit, and function for dependable operation
• Manufactured with high-quality materials for long service life
• Backed by AISIN’s reputation as a global automotive supplier since 1965

Who is this for: The AISIN THN-007 thermostat with housing is for owners and technicians working on compatible Infiniti and Nissan models who want an OEM-quality replacement. It’s a good choice when the vehicle shows symptoms of thermostat-related issues (irregular temperature gauge readings, extended warm-up, or cooling system instability) or during routine cooling system maintenance when replacing worn components is prudent.