Gates 33941S Engine Coolant Thermostat - Lower

Gates Premium Thermostat for Nissan Cooling Systems

The Gates Premium Thermostat 33941S is an engine coolant thermostat built for Nissan and INFINITI applications that call for an 180-degree opening temperature. It uses stainless steel and copper construction, an O-ring seal, and a jiggle pin weep hole to support stable coolant control in everyday driving.

Gates Premium Thermostat line components are built with upgraded spring tension and corrosion-resistant materials to help maintain consistent operating temperature under normal conditions. This part number, 33941S, is a direct-fit option for a range of Nissan Altima, Frontier, Rogue, Sentra, Pathfinder, X-Trail, Rogue Select, and INFINITI QX60 applications.

Key Features

• Engine coolant thermostat with 180-degree start-to-open temperature
• Heavy-gauge stainless steel and copper construction
• Bottom by-pass design with O-ring seal
• Jiggle pin weep hole for air bleeding during service
• Corrosion-resistant construction for long-term cooling system use
• Upgraded spring for improved temperature stability under normal operation
• Gates part number 33941S

Detailed Description

Gates 33941S is a premium thermostat engineered for precise coolant flow control in vehicles that require an OE-temperature 180-degree thermostat. The stainless steel and copper body helps resist corrosion inside the cooling system, while the spring design is intended to maintain more consistent opening behavior as engine temperature changes. With a bottom by-pass layout, this thermostat matches the cooling system architecture used in many Nissan and INFINITI applications.

Compatible With 2015-2018 Nissan Altima, 2015-2018 Nissan Frontier, 2014-2017 INFINITI QX60, 2015-2017 Nissan Rogue, and 2015 Nissan Rogue Select in the listed applications. It also serves lower-position applications such as 2002-2014 Nissan Altima, 2005-2008 Nissan Frontier, 2014 Nissan Pathfinder, 2008-2014 Nissan Rogue, 2002-2012 Nissan Sentra, 2008 Nissan X-Trail, and 2002-2007 Nissan X-Trail. This part cross-references Motorad 427-180 for the same application.

What It Helps Address

• Engine running too cool or taking too long to reach operating temperature
• Temperature fluctuation caused by a worn thermostat spring
• Coolant flow issues related to a sticking thermostat valve
• Corrosion-related thermostat wear inside the cooling system
• Service replacement for OE-temperature Nissan and INFINITI cooling systems

Installation Notes and Tips

Verify the thermostat position and temperature rating against the vehicle application before installation. This part uses an O-ring seal and includes a jiggle pin weep hole, so the sealing surface should be clean and free of debris before assembly. Confirm the cooling system is properly bled after service to reduce trapped air and restore normal coolant circulation.

Quality Assurance

Gates Premium Thermostat 33941S is built with stainless steel construction for improved corrosion resistance and an upgraded spring for temperature stability under normal operating conditions. The design and materials are aligned with service replacement needs for Nissan Altima, Frontier, Rogue, Sentra, Pathfinder, X-Trail, Rogue Select, and INFINITI QX60 cooling systems.