Cooling Fan Switch for 1997-1998 BMW 740i & More - Beck/Arnley 201-1778

$47.99

Beck/Arnley Engine Cooling Fan Switch 201-1778

Beck/Arnley Engine Cooling Fan Switch 201-1778 - view 2

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Part number: 201-1778

Beck/Arnley Engine Cooling Fan Switch P/N:201-1778

$47.99

Description

Keep engine temperatures in check with the Beck/Arnley Engine Cooling Fan Switch (P/N 201-1778, also written 2011778). This thermo fan switch senses coolant temperature and opens or closes the circuit that commands the cooling fan, helping the system cycle the fan on when the coolant reaches its trigger point. It's a direct-fit replacement for many BMW models, among them the 1997-1998 BMW 740i, the 1997-1998 BMW 740iL and the 1997-1998 BMW 528i. See the "Vehicles it fits" section for the full list and engine-level detail on your specific vehicle.

OE-matched design: Built to match the form, fit, and function of the original equipment switch on foreign-nameplate applications.
Application specific: Sourced for your vehicle — check the catalog data and confirm fit before ordering.
Diagnose first: Professional diagnostics are recommended for a successful repair. If a faulty temperature switch is the cause of a fan that won't cycle or an overheating condition, this replaces it.
Related checks: Verify cooling fan motor current draw, control module/relay function, and the electrical wiring and connectors before condemning the switch.

Signs this switch may need replacing include a cooling fan that fails to engage or runs continuously, though these symptoms can have other causes.

Interchange: 1S2815 · 61318360857 · TFS692 · 80206068615 · TS581 · SW3011

Manufacturer's description

Product specs

Vehicles it fits

Interchange numbers

This part cross-references / interchanges with the following part numbers:

1S2815, 61318360857, TFS692, 80206068615, TS581, SW3011

Buyer's Q&A

Frequently Asked Questions

What does this cooling fan switch do?

It's a thermostatic switch that senses coolant temperature and opens or closes the circuit that commands the engine cooling fan, so the fan cycles on when the coolant reaches its trigger point.

Which vehicles does part 201-1778 fit?

It fits many BMW models, among them the 1997-1998 BMW 740i, the 1997-1998 BMW 740iL and the 1997-1998 BMW 528i. Check the "Vehicles it fits" section for the full list and confirm fit before ordering.

How do I know if this switch has failed?

A fan that won't engage or that runs continuously may point to the switch, but always run professional diagnostics first — these symptoms can have other causes.

What else should I check before replacing it?

Check the cooling fan motor current draw, the control module or relay function, and the electrical wiring and connectors, since any of these can produce similar fan issues.

What interchange numbers does this replace?

It cross-references 1S2815, 61318360857, TFS692, 80206068615, TS581, and SW3011. Match your original part number to confirm the correct replacement.