Motorad 343-180 Engine Coolant Thermostat Housing Assembly

Integrated Thermostat Housing for Nissan and INFINITI

Motorad 343-180 is an integrated engine coolant thermostat housing assembly built to OE specifications for select Nissan and INFINITI applications. It combines the thermostat, housing, and gasket in one service part, with a 180°F opening temperature for direct replacement on many 370Z, Maxima, G37, and Q50 cooling systems.

Key Features

• Integrated housing thermostat assembly for simplified cooling system service
• 180°F opening temperature and 180°F start-to-open temperature
• OE-style seals and paper gasket included where applicable
• Aluminum, stainless steel, and copper construction
• 2 bolt holes, 1 outlet port, and 1.38 in outlet diameter
• Silver finish with offset design and air relief valve details referenced by the manufacturer
• OE supplier manufacturing with OEM quality materials and processes

Product Details

The Motorad Integrated Housing Thermostat line focuses on direct-fit cooling system service parts that match OE specifications and temperature control requirements. Part number 343-180 uses a copper case and wax compound for quick response to coolant temperature changes, helping maintain stable engine operating temperature in demanding driving conditions. This part cross-references Dorman OE Solutions 902-5140 for the same application.

Compatible With select Nissan 370Z, Nissan Maxima, INFINITI G37, INFINITI Q50, INFINITI Q70, INFINITI Q70L, INFINITI QX50, INFINITI QX70, INFINITI Q60, INFINITI Q40, INFINITI EX37, INFINITI FX37, INFINITI M37, INFINITI M35h, INFINITI EX35, INFINITI FX35, INFINITI G25, and INFINITI I30 applications. Motorad 343-180 is a practical OE-style replacement when servicing a thermostat housing assembly on these vehicles.

Common Cooling System Issues This Part Can Address

• Engine running too cool or taking too long to reach operating temperature
• Thermostat housing leakage at the gasket or seal surface
• Temperature control problems caused by a worn thermostat element
• Corrosion or wear in the original housing assembly
• Cooling system service needs on OE-specified 180°F applications

Installation Notes

Verify the 180°F temperature specification, outlet diameter, bolt-hole count, and housing style before installation. This assembly includes the thermostat, housing, and gasket for listed applications, and the paper gasket should be installed on a clean, flat mating surface. Follow factory service procedures, bleed the cooling system as required, and confirm proper coolant level after installation. For fitment language, this part fits 2009-2020 Nissan 370Z, 2000-2001 Nissan Maxima, and 1995-1999 Nissan Maxima, along with the listed INFINITI applications in the fitment data.

Quality Assurance

Manufactured by an OE supplier using OEM quality materials and OEM specifications, Motorad 343-180 is built to meet the demands of modern cooling systems. The integrated housing design, OE-style sealing approach, and temperature-calibrated thermostat support consistent replacement quality for Nissan and INFINITI service work.