Four Seasons 46091 Engine Cooling Fan Clutch

Severe Duty Thermal Fan Clutch

The Four Seasons 46091 engine cooling fan clutch is a severe duty thermal unit built for reverse rotation applications. It is a direct-fit cooling component for select Toyota and Lexus trucks and SUVs, including Toyota Tundra, Sequoia, Land Cruiser, and Lexus GX460 and LX570 applications.

Four Seasons Fan Clutch 46091 is a new, aluminum thermal fan clutch that meets or exceeds OEM requirements and is rated for performance use in demanding cooling systems.

Key Features

• Brand: Four Seasons Fan Clutch
• Part number: 46091
• Thermal, severe duty fan clutch design
• Reverse rotation (REV) application
• Aluminum construction with raw aluminum finish
• Mounting type: flange
• 4 bolt holes and 4 mounting holes
• Meets or exceeds OEM specifications
• Performance rated for truck and SUV cooling systems
• New replacement part, not remanufactured

Product Details

This Four Seasons 46091 fan clutch is engineered for severe duty cooling performance in reverse rotation engine fan systems. It uses a thermal clutch design to regulate fan engagement based on temperature demand, helping maintain consistent airflow through the radiator and cooling stack in heavy-use applications. The aluminum body, 7.42-inch clutch diameter, 3.3-inch mount diameter, and 6.84-inch fan bolt circle support proper fitment in the specified Toyota and Lexus platforms.

Compatible With 2021-2023 Lexus GX460, 2021-2022 Toyota Sequoia, 2021 Lexus LX570, 2021 Toyota Land Cruiser, 2021 Toyota Tundra, 2010-2020 Lexus GX460, 2013-2020 Lexus LX570, 2008-2011 Lexus LX570, 2013-2020 Toyota Land Cruiser, 2008-2011 Toyota Land Cruiser, 2008-2020 Toyota Sequoia, and 2007-2020 Toyota Tundra. This part cross-references Gates 22408 for the same application.

Common Cooling System Issues

• Engine fan engagement that is weak, delayed, or inconsistent
• Cooling performance loss during towing, idle, or stop-and-go driving
• Excessive fan noise from a worn thermal clutch
• Overheating concerns in severe duty truck and SUV use
• Reduced airflow control in reverse rotation fan systems

Installation Notes

Verify reverse rotation orientation, flange mounting style, bolt pattern, pilot dimensions, and fan bolt circle before installation. Mounting hardware is not included, so reuse or source the correct hardware for the vehicle. Confirm clearance, overall height, and clutch-to-flange distance during replacement on Toyota Tundra, Sequoia, Land Cruiser, Lexus GX460, and Lexus LX570 cooling assemblies.

Quality Assurance

Four Seasons lists this fan clutch as a new part that meets or exceeds OEM requirements and is performance rated for severe duty use. The 46091 is built as a thermal fan clutch for truck fan drive applications where dependable cooling control is required.