Facet 7.8400S Engine Coolant Thermostat

Engine Coolant Thermostat for Nissan and Infiniti

Facet 7.8400S is an engine coolant thermostat for select Nissan and INFINITI applications. It is a direct-fit cooling system service part for drivers replacing a worn thermostat on vehicles such as the Nissan Frontier, Xterra, Altima, Sentra, 240SX, and INFINITI G20.

Key Features

• Engine coolant thermostat for cooling system temperature control
• Fits select Nissan and INFINITI models from 1989-2004
• Application-specific fitment for common Nissan thermostat service jobs
• Facet part number 7.8400S for catalog lookup and ordering
• Compatible with vehicles listed below, without gasket

Detailed Description

Facet 7.8400S is an engine coolant thermostat used to regulate coolant flow and help the engine reach and maintain proper operating temperature. This part number 7.8400S is listed for a wide range of Nissan and INFINITI vehicles, including Nissan Frontier, Xterra, Altima, Sentra, 200SX, 240SX, Pickup, D21, NX, and INFINITI G20 applications. For buyers searching for a Nissan Frontier thermostat, Nissan Altima thermostat, or INFINITI G20 thermostat, this part provides a fitment-specific replacement option.

This part cross-references common thermostat applications by part number for the same vehicle coverage. Use the vehicle fitment details to confirm the exact year and model before installation.

Vehicle Fitment

• Fits 1998-2004 Nissan Frontier, N/A, without gasket
• Fits 2000-2004 Nissan Xterra, N/A, without gasket
• Fits 1993-2001 Nissan Altima, N/A, without gasket
• Fits 1998-2001 Nissan Sentra, N/A, without gasket
• Fits 1991-1994 Nissan Sentra, N/A, without gasket
• Fits 1999 INFINITI G20, N/A, to 07/1999; without gasket
• Fits 1995-1998 Nissan 200SX, N/A, without gasket
• Fits 1989-1998 Nissan 240SX, N/A, without gasket
• Fits 1995-1997 Nissan Pickup, N/A, without gasket
• Fits 1991-1996 INFINITI G20, N/A, without gasket
• Fits 1990-1994 Nissan D21, N/A, without gasket
• Fits 1991-1993 Nissan NX, N/A, without gasket

Common Issues This Part Can Address

• Engine running too cool or taking too long to warm up
• Temperature fluctuations during normal driving
• Overheating caused by a thermostat that is stuck closed
• Poor heater performance from incorrect coolant temperature regulation
• Cooling system service on a Nissan Frontier, Altima, Sentra, or Xterra

Installation Notes and Tips

Confirm the year, make, and model match the listed fitment before ordering. This application is listed without gasket, so verify the sealing components required for your specific repair. Clean the thermostat housing mating surfaces before installation and refill the cooling system with the correct coolant mixture after service.

Quality Assurance

Facet cooling system components are cataloged for specific vehicle applications, and this thermostat is identified by part number 7.8400S for accurate fitment lookup.