Hella 007837001 Engine Cooling Fan Switch

Hella Engine Cooling Fan Switch 007837001

Hella 007837001 is a 12V engine cooling fan switch built for vehicles that use a 3-pin, round-plug, bolted thermal switch setup. It operates as a dual-output switch with a switching range from 86°C to 99°C, helping control fan activation based on coolant temperature.

Compatible With BMW 318is, 840Ci, 850Ci, Z3, 318i, 318ti, 325i, 325is, 525i, 530i, 540i, 850CSi, M3, 740i, 740iL, 750iL, 535i, M5, 735i, 735iL, 850i, and 325iX applications listed below. This part number, 007837001, is also referenced in cross listings for select cooling-system applications.

• 12V engine cooling fan switch with dual thermal switch function
• 3-pin design with female round plug and black connector
• Bolted mounting style with M14 x 1.5 thread size
• Switch point range: 86°C to 99°C (186.8°F to 210.2°F)
• Gasket or seal included
• Terminal type: bullet; terminal quantity: 3

Cooling Control and Fitment Details

Hella 007837001 is used to trigger engine cooling fan operation at the specified temperature range, supporting temperature-based fan control in BMW cooling systems. The 24 mm hex/spanner size and threaded M14 x 1.5 body make it a direct-style thermal switch for vehicles that use this connector and mounting configuration. The part number 007837001 appears in fitment for BMW 318is, BMW 525i, and BMW M3 applications, along with additional BMW models listed in the fitment table.

This part cross-references Facet 7.5617 for the same application.

What It Helps Solve

• Cooling fan not switching on at the correct temperature
• Fan cycling too late or too early
• Overheating caused by a failed thermal switch
• Intermittent fan operation from worn switch contacts
• Cooling-system warning signs tied to temperature control faults

Installation Notes

Verify the connector style, thread size, voltage, and switch temperature range before installation. This unit uses a 3-pin round plug, female connector, and bolted mounting design, so matching the original configuration is important for proper operation. Assy/disassy by qualified personnel required is noted in the product data, so installation should be performed by a trained technician familiar with BMW cooling-system service.

• Fits 1991-1997 BMW 318is, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1994-1997 BMW 840Ci, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1993-1997 BMW 850Ci, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1997 BMW Z3, N/A — To 05/1997
• Fits 1996 BMW Z3, N/A — To 07/1996
• Fits 1991-1995 BMW 318i, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1995 BMW 318ti, N/A — 91-99 Degrees C
• Fits 1995 BMW 325i, N/A — To 09/1995
• Fits 1995 BMW 325is, N/A — To 09/1995
• Fits 1990-1995 BMW 525i, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1994-1995 BMW 530i, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1994-1995 BMW 540i, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1994-1995 BMW 850CSi, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1995 BMW M3, N/A — To 09/1995
• Fits 1990-1994 BMW 325i, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1990-1994 BMW 325is, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1993-1994 BMW 740i, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1993-1994 BMW 740iL, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1990-1994 BMW 750iL, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1990-1993 BMW 535i, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1991-1993 BMW M5, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1990-1992 BMW 735i, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1990-1992 BMW 735iL, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1991-1992 BMW 850i, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1990-1991 BMW 325iX, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact
• Fits 1990-1991 BMW M3, N/A — 12V - 3-Pin Connector - Round Plug - Bolted - Dual Output/Normally Open Contact

Quality Assurance

Hella supplies a broad range of vehicle switches with a focus on consistent construction and application-specific fitment. Part number 007837001 follows the listed electrical, thread, and connector specifications for the BMW cooling applications shown above.