Aisin THN-020 Engine Coolant Thermostat - Left or Upper

Aisin THN-020 Engine Coolant Thermostat

The Aisin THN-020 engine coolant thermostat is an OE-manufactured replacement built for exact form, fit, and function. It uses brass and stainless steel construction, includes the thermostat seal, and opens at 95°C (203°F) for Nissan cooling system applications that require factory-style temperature control.

Key Features

• OE-manufactured for exact form, fit, and function
• Brass and stainless steel construction
• In-line thermostat design
• Start-to-open temperature: 95.0°C (203°F)
• Sealing flange outside diameter: 52.0
• Gasket or seal included
• Fits left and upper thermostat locations depending on application

Detailed Description

The Aisin THN-020 is an engine coolant thermostat designed for Nissan cooling systems that call for a 95°C OE-temperature thermostat. As an Original Equipment Manufacturer part, it is built to match the factory specification for temperature regulation, helping maintain proper engine operating temperature and coolant flow control. This part number is used across multiple Nissan applications, including Sentra, Rogue Sport, NV200, Juke, Cube, and Kicks models.

This part cross-references Gates 34160 for the same application. Aisin THN-020 is also listed against OE-style references 21230-3RC0A and 21230-3RC1A.

What It Helps Address

• Engine running too cool or too warm due to thermostat wear
• Delayed coolant flow regulation during warm-up
• Temperature instability in Nissan cooling systems
• Thermostat leakage at the sealing surface
• Replacement needs for OE-spec thermostat service

Installation Notes and Tips

• Verify the thermostat position before ordering: this part is listed for left and upper applications depending on vehicle.
• Confirm the OE temperature requirement of 95°C (203°F) for the specific Nissan model and engine setup.
• Replace the thermostat seal during service; the seal is included with this part.
• Inspect the housing and mating surfaces for corrosion or debris before installation.
• Use fresh coolant and bleed the cooling system according to factory procedure after installation.

Quality Assurance

Aisin supplies Original Equipment Manufacturer cooling components, and the THN-020 is manufactured to match factory form, fit, and function for the listed Nissan applications. It is built with brass and stainless steel materials for thermostat service in OE-style cooling systems.

• Fits 2025 Nissan Kicks, left
• Fits 2017-2025 Nissan Sentra, left
• Fits 2018-2022 Nissan Rogue Sport, left
• Fits 2014-2020 Nissan NV200, upper
• Fits 2014-2016 Nissan Sentra, upper
• Fits 2013-2015 Nissan Juke, upper
• Fits 2013-2014 Nissan Cube, upper
• Fits 2012 Nissan Cube, upper
• Fits 2012 Nissan Juke, upper