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PAI · Probes & Sensors
MSW-4401
In stock · ships from Knoxville
This water temperature sender (sensor) threads into the engine block or cylinder head to monitor coolant temperature and transmit a signal to the dash gauge, helping you spot overheating before it causes damage.
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Verified fitment for 4 applications
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All confirmed applications for this part number.
Requires a compatible Stewart Warner gauge (for Kenworth/Peterbilt) or a mechanical gauge on Mack applications. Verify your gauge type and sender resistance range before ordering.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 7 of 7.
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It's a common replacement part when the temperature gauge reads erratically or fails entirely. Designed as a direct-fit aftermarket component for select Mack, Peterbilt, and Kenworth trucks that use Stewart Warner or compatible mechanical gauges, it’s often sold in a convenient 2-pack for fleet service.
Part Number: MSW-4401
WATER TEMPERATURE SENSOR
Dealer: Post Onsite
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