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Mack · Electrical & Lighting
21286175
In stock · ships from Knoxville
This is a Mack 21286175 alternator, a 12-volt, 160-amp brush-style alternator from the Delco Remy 24SI series.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 8 applications
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All confirmed applications for this part number.
Sterling
Western Star
Other applications
Sterling
Western Star
Other applications
Applications taken from aftermarket cross-reference listings (World American WA2412160PN). Always confirm pad mount, pulley diameter, and electrical connections before installation.
Part data verified against 3 catalog sources
Numbers this part supersedes or interchanges with. Showing 16 of 24.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It charges the battery and powers electrical systems on heavy-duty trucks, featuring a quad pad mount and dual internal fans for cooling. Replace it if you notice dimming lights, a battery warning light, hard starting, or grinding noises from worn bearings.
Part Number: 21286175
ALTERNATOR
Vendor: MHC Kenworth
Dealer: KP Services Crossville
Compatibility, alternatives, and more
Parts commonly needed alongside electrical & lighting
