Cooling Fan Switch for 1997-2000 BMW 528i & More - Standard Ignition TS-581

Help keep your BMW's electric cooling fan switching on when the engine needs it with the Standard Ignition switch TS-581. This coolant fan switch makes electrical contact at its set temperature and passes that signal to the fan controller. It is a direct-fit replacement for many BMW models, among them the 1997-1998 BMW 740i, 1997-2000 BMW 528i, and 1997-1998 BMW 540i. See the "Vehicles it fits" section for the full list and engine details.

• Factory-calibrated set point: Each thermal switch is calibrated at the factory to make electrical contact at its specified lower-temperature set point.
• Tested actuation: All units are calibrated and tested to confirm the switch actuates at its specified temperature, and the signal is sent on to the fan controller.
• Quality control throughout: Standard Ignition is a global manufacturer of original equipment ignition products. It keeps quality control in place across the whole manufacturing process, from components to finished product.
• Built for the shop: A robust design and high-grade materials are intended to meet the demands of today's service professional.

Signs this part may need replacing include a cooling fan that won't come on, a fan that runs all the time, or a temperature gauge that climbs in slow traffic. These symptoms can also come from wiring, relays, or the fan itself, so diagnose the cooling system before you replace the switch.

Interchange: 61318360857 · TFS692 · SW3011 · FS327

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