Keep your BMW's electric cooling fan switching on at the right coolant temperature with the Standard Ignition Engine Cooling Fan Switch, part number TS-288. It installs as a direct-fit replacement across a wide span of BMW models, including the 1978-1984 633CSI and 733I, 1982-1988 528E, 1984-1987 325E, 1985-1993 535I, 1987-1994 325I and 325IS, and 1988-1991 M3 — see the Buyer's Guide tab for the full list of covered years and models.
This thermal switch monitors engine coolant temperature and opens or closes the electrical circuit that runs the cooling fan, energizing the fan once coolant reaches its set point and switching it off again as the coolant cools down.
- Function: senses coolant temperature and controls the electric cooling fan circuit accordingly.
- Signs it may need replacing: a fan that won't turn on as temperatures climb, or one that runs constantly — if a failed switch is the cause, this replaces it.
- Fitment: a direct-fit replacement for the listed BMW applications.
Interchange: 1364272 · 61311357073 · 61311364272 · TFS544 · FS198
Manufacturer part number TS-288 (also TS288)
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this cooling fan switch do?
It senses engine coolant temperature and opens or closes the electrical circuit for the cooling fan, turning the fan on when coolant reaches its set point and off again as it cools.
Which vehicles does the TS-288 fit?
It's cataloged for many BMW models, including the 633CSI, 733I, 528E, 325E, 535I, 325I, 325IS and M3. Check the Buyer's Guide tab for the exact years for your model.
What are the signs this switch may need replacing?
A cooling fan that won't turn on as temperatures rise, or one that runs constantly. If a faulty fan switch is the cause, replacing it addresses that; diagnose the circuit first.
What numbers does this part interchange with?
Its interchange numbers are 1364272, 61311357073, 61311364272, TFS544 and FS198. Its own manufacturer part number is TS-288.
Where is the cooling fan switch located?
Its mounting location varies by application; consult your BMW service information for the exact location on your engine's cooling system.
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