Four Seasons 35879 Engine Cooling Fan Controller

Engine Cooling Fan Controller for OE-Style Control

Four Seasons 35879 is an adjustable engine cooling fan controller built for 12-volt electric fan systems. It provides a practical OE-style replacement for vehicles that need reliable fan activation control, including many Subaru, Hyundai, BMW, and Ford applications.

Four Seasons Fan Controller line products are focused on cooling-system service parts for electric fans and accessories, giving technicians a direct replacement option when fan control performance becomes inconsistent.

Key Features

• Adjustable activation control for fan engagement settings
• 12-volt design with a 25-amp amperage rating
• 6-terminal layout with spade / wire lead connections
• Plastic cover and black housing
• Mount type: optional; bracket not included
• Mounting hardware included
• Meets or exceeds OEM requirements

Product Details

This engine cooling fan controller is designed for electric fan systems that require adjustable temperature-based control. The Four Seasons 35879 uses a 6-terminal configuration and spade / wire lead terminals for straightforward integration into many cooling-system setups. Its 25-amp rating supports common 12-volt fan accessory applications, while the adjustable activation control allows the system to be set to the desired operating point.

For buyers searching for a Four Seasons 35879 fan controller, this part cross-references Gates 18905 and DENSO Auto Parts 5305 for the same application. It is a direct-fit style solution for a wide range of vehicles, including Subaru Forester, Subaru WRX, Hyundai Elantra, BMW 328i, and Ford F-150 applications listed in the fitment data.

Common Problems It Can Help Solve

• Electric cooling fan not switching on at the correct temperature
• Fan cycling too early or too late
• Unstable engine temperature during stop-and-go driving
• Cooling fan control issues after fan or accessory replacement
• Loss of consistent electric fan operation in daily driving or towing conditions

Installation Notes and Tips

• Verify the vehicle’s fan control layout and terminal style before installation.
• Use the adjustable setting to match the desired fan activation point.
• Confirm the system is 12 volts and within the 25-amp rating.
• Optional mount type allows flexible placement; bracket is not included.
• Check wiring condition and connector integrity during replacement.

Fitment Coverage

• Fits 2016-2021 Subaru Forester, N/A; Premium Adjustable Fan Controller Push-In Type; Fan Controller
• Fits 2016-2021 Subaru Impreza, N/A; Premium Adjustable Fan Controller Push-In Type; Fan Controller
• Fits 2016-2021 Subaru Legacy, N/A; Premium Adjustable Fan Controller Push-In Type; Fan Controller
• Fits 2016-2021 Subaru Outback, N/A; Premium Adjustable Fan Controller Push-In Type; Fan Controller
• Fits 2016-2021 Subaru WRX, N/A; Premium Adjustable Fan Controller Push-In Type; Fan Controller
• Fits 2016-2021 Subaru WRX STI, N/A; Premium Adjustable Fan Controller Push-In Type; Fan Controller
• Fits 2016-2020 Subaru BRZ, N/A; Premium Adjustable Fan Controller Push-In Type; Fan Controller
• Fits 2017 Hyundai Creta, N/A; Adjustable push-in design Engine Cooling Fan Controller; Fan Controller
• Fits 2009-2017 Hyundai Elantra, N/A; Adjustable push-in design Engine Cooling Fan Controller; Fan Controller
• Fits 2013-2017 Hyundai Elantra GT, N/A; Adjustable push-in design Engine Cooling Fan Controller; Fan Controller
• Fits 2015-2017 Hyundai Grand i10, N/A; Adjustable push-in design Engine Cooling Fan Controller; Fan Controller
• Fits 2009-2017 Hyundai Santa Fe, N/A; Adjustable push-in design Engine Cooling Fan Controller; Fan Controller
• Fits 2013-2017 Hyundai Santa Fe Sport, N/A; Adjustable push-in design Engine Cooling Fan Controller; Fan Controller
• Fits 2013-2017 Hyundai Santa Fe XL, N/A; Adjustable push-in design Engine Cooling Fan Controller; Fan Controller
• Fits 2009-2017 Hyundai Sonata, N/A; Adjustable push-in design Engine Cooling Fan Controller; Fan Controller
• Fits 2009-2017 Hyundai Tucson, N/A; Adjustable push-in design Engine Cooling Fan Controller; Fan Controller
• Fits 2009-2016 Hyundai Accent, N/A; Adjustable push-in design Engine Cooling Fan Controller; Fan Controller
• Fits 2009-2016 Hyundai Azera, N/A; Adjustable push-in design Engine Cooling Fan Controller; Fan Controller
• Fits 2012-2016 Hyundai Veloster, N/A; Adjustable push-in design Engine Cooling Fan Controller; Fan Controller
• Fits 2013-2015 Acura ILX, N/A; Adjustable push-in design Engine Cooling Fan Controller; Fan Controller
• Fits 2014-2015 Acura RLX, N/A; Adjustable push-in design Engine Cooling Fan Controller; Fan Controller
• Fits 2015 Acura TLX, N/A; Adjustable push-in design Engine Cooling Fan Controller; Fan Controller

Quality Assurance

Four Seasons 35879 is listed as meeting or exceeding OEM requirements, giving you an OE-style replacement option for cooling fan control service. The part number 35879 is also used across multiple interchange references, which helps confirm application coverage for repair planning.