Four Seasons 36511 Engine Cooling Fan Switch

Engine Cooling Fan Switch for OE-Style Temperature Control

Four Seasons 36511 is an engine cooling fan switch built for temperature-based fan operation on select import applications. It uses a 2-terminal, male connector design with an M14 x 1.50 fitting thread size and engine-mounted placement for direct temperature signaling.

As part of the Four Seasons Temperature Switch line, this component is focused on accurate fan engagement and OE-style fitment. It meets or exceeds OEM requirements and is listed for applications including BMW 320i, BMW 325i, BMW 535i, and Acura TL cooling system service.

Key Features

• Four Seasons Temperature Switch line
• Part number 36511
• Engine cooling fan switch for temperature-controlled fan operation
• Engine-mounted design
• 2-terminal male connector with black open connector shape
• M14 x 1.50 fitting thread size
• Fan open/closed operation with 194°F off and 203°F on settings
• Meets or exceeds OEM requirements

Detailed Product Overview

Four Seasons 36511 is a temperature switch used to trigger engine cooling fan operation when coolant temperature reaches the specified threshold. The switch is designed with a black, open-style connector, two terminals, and a male fitting for engine-mounted installation. Its 194°F off and 203°F on temperature range supports controlled fan cycling in systems that rely on a temperature switch rather than a separate control module.

This part number 36511 is listed across a broad range of BMW and Acura applications, including BMW 320i, BMW 325i, BMW 535i, BMW M3, BMW 528e, and Acura TL. For buyers searching for a BMW cooling fan temperature switch, engine-mounted coolant fan switch, or Four Seasons 36511 replacement, this part provides the specified thread, connector, and operating temperature details needed for correct selection.

This part cross-references Eastern Catalytic 50232 for the same application.

What This Part Helps Address

• Cooling fan not switching on at the correct temperature
• Cooling fan staying on longer than expected
• Temperature-based fan control faults in engine-mounted systems
• Replacement needs for worn or inaccurate fan switches
• Service on BMW and Acura cooling systems using a 2-terminal temperature switch

Installation Notes and Tips

Verify the connector style, terminal count, and M14 x 1.50 thread before installation. Confirm the temperature switch location on the engine and compare the 194°F off / 203°F on specifications to the original part. For fitment-specific searches, this part is commonly referenced for Fits 1977-1983 BMW 320i, N/A; Fits 1984-1987 BMW 325e, N/A; Fits 1987-1994 BMW 325i, N/A; Fits 1985-1993 BMW 535i, N/A; and Fits 1995 Acura TL, N/A.

Additional fitment coverage includes BMW 318i, 318is, 325is, 325iX, M3, 528e, 524td, 735i, 635CSi, and 535is applications listed in the vehicle data.

Quality Assurance

Four Seasons identifies this switch as meeting or exceeding OEM requirements, supporting OE-style replacement selection for temperature-controlled engine cooling fan systems.