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Built to support repair shops, fleets, and equipment owners with dependable parts sourcing and responsive service.
Qualifying new parts include 1-year coverage. Review the Warranty Policy section for coverage details, claim steps, and exclusions.
Eligible orders may qualify for returns within 90 days. See the Easy Return Policy section for conditions and next steps.
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| Model Number | SB-II, SB-I, SB-II 30 MAX, Super II 30, Super II MAX, Super NWD, NWD, SB-II 30 TC, SB-II 30 di, SNWD, Sentry 30 TC, Sentry 30 di |
| Compatible Model Brand | For Thermo King |
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Official answers about compatibility, package contents, specifications, installation, shipping, and warranty for 12V 51A Alternator 8446257 4117D21G01 4117D21G02 for Thermo King Refrigeration Unit SB-I SB-II Sentry Super NWD (SKU: ESY90909).
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Every new aftermarket part from us includes a 1-year warranty. Full terms, coverage, and how to make a claim: Warranty Assistance.
We ship to customers around the world. Orders are sent with our standard courier service—trackable, dependable, and easy to work with. On this product page, use Get Estimate under the price to see shipping cost and estimated delivery for your location. For destinations, rules, and full details, read our Shipping Policy Details.
We want you to be confident in your order. If you are not satisfied, you may qualify for a return or refund within 90 days, subject to conditions. See our Easy Return Policy for eligibility, steps, and exceptions.
