Standard Ignition TS-303 Engine Cooling Fan Switch
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Standard Ignition

Standard Ignition TS-303 Engine Cooling Fan Switch

Brand Standard Ignition TS-303
Connector Gender Female
Terminal Gender Male
Terminal Type Blade
Fits Volkswagen · 20 vehicles

Factory-calibrated switch. Provides precise fan control at the specified temperature.

Creep-action design. Uses a bimetal contact arm for consistent electrical response.

OE ignition pedigree. Built by a global original-equipment manufacturer with complete quality control.

Cross-references Four Seasons 37442, VEMO V15-99-2013 and 1T1225 for the same application. See all 11.

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Engine Cooling Fan Switch for Volkswagen

Standard Ignition TS-303 is an engine cooling fan switch built for Volkswagen applications that require a 4-terminal electrical connection. It uses a calibrated thermal design to trigger fan control at the specified temperature, helping maintain consistent cooling system operation in Beetle, Golf, Passat, and Corrado models.

Key Features

  • Female connector gender with male blade terminals
  • 4-terminal configuration for the specified cooling fan circuit
  • Factory-calibrated and tested for switch actuation temperature
  • Thermal design uses a wax element and bimetal contact arm for precise electrical switching
  • Built with high-grade materials for service use

Detailed Description

The Standard Ignition TS-303 engine cooling fan switch is engineered to transfer the electrical signal to the fan controller when coolant temperature reaches the calibrated set point. Its thermal mechanism uses a wax-based expansion element and a formed bimetal contact arm to create a controlled snap-action response, supporting accurate fan engagement in Volkswagen cooling systems. This part number TS-303 is a direct-fit style replacement for select 4-terminal applications in the Volkswagen Beetle, Golf, Passat, and Corrado.

This part cross-references Four Seasons 37442 for the same application.

What It Is Used For

  • Cooling fan not switching on at the proper temperature
  • Fan cycling inconsistently due to a worn thermal switch
  • Temperature control issues in the radiator fan circuit
  • Electrical signal loss between the cooling system sensor and fan controller
  • Replacement of a failed 4-terminal engine cooling fan switch

Installation Notes and Tips

  • Verify the connector style, terminal count, and blade terminal layout before installation.
  • Confirm the vehicle uses a 4-terminal cooling fan switch application.
  • Check the cooling system for proper coolant level and thermostat operation before replacing the switch.
  • Match the replacement to the original temperature specification for correct fan control.

Quality Assurance

Standard Ignition manufactures thermal switches with complete quality control from component selection through final testing. Each unit is calibrated and tested to confirm actuation at the specified temperature, and TS-303 is built to meet the demands of professional service work.

  • Fits 1998-2001 Volkswagen Beetle, N/A, 4 Term.
  • Fits 1995-2001 Volkswagen Golf, N/A, 4 Term.
  • Fits 1995-1997 Volkswagen Passat, N/A, 4 Term.
  • Fits 1990-1995 Volkswagen Corrado, N/A, 4 Term.

Related reading

This part fits 20 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2001VolkswagenBeetle——N/A4 Term.
2001VolkswagenGolf——N/A4 Term.
2000VolkswagenBeetle——N/A4 Term.
2000VolkswagenGolf——N/A4 Term.
1999VolkswagenBeetle——N/A4 Term.
1999VolkswagenGolf——N/A4 Term.
1998VolkswagenBeetle——N/A4 Term.
1998VolkswagenGolf——N/A4 Term.
1997VolkswagenGolf——N/A4 Term.
1997VolkswagenPassat——N/A4 Term.
1996VolkswagenGolf——N/A4 Term.
1996VolkswagenPassat——N/A4 Term.
1995VolkswagenCorrado——N/A4 Term.
1995VolkswagenGolf——N/A4 Term.
1995VolkswagenPassat——N/A4 Term.
1994VolkswagenCorrado——N/A4 Term.
1993VolkswagenCorrado——N/A4 Term.
1992VolkswagenCorrado2.8LV6N/A4 Term.
1991VolkswagenCorrado——N/A4 Term.
1990VolkswagenCorrado——N/A4 Term.
Directly replaces or cross-references 11 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Four Seasons — 37442VEMO — V15-99-20131T122515-5037953-7506201-1851357919369EFS269RF106SW1634TFS629