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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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| Engine Number | 4B3.9, 6B5.9, B4.5, ISB CM2150, ISBE CM2150, B3.3, B6.7 CM2350 B121B, B6.7 CM2350 B136C, B6.7, ISB6.7 CM2250, ISBe4 CM850, ISL CM554, ISB/ISD6.7 CM2150 SN, ISB6.7 CM2350 B101, B6.7 CM2350 B157C, B6.7 CM2450 B155B, B6.7N CM2380 B150B, ISB6.7 G CM2180 B118 |
| Compatible Engine Brand | For CUMMINS |
| original | 5270678, 4929688, 38702, 0239233 |
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Official answers about compatibility, package contents, specifications, installation, shipping, and warranty for Belt Tensioner 5270678 4929688 0239233 for Cummins Engine B3.3 B4.5 4B3.9 6B5.9 B6.7 ISB6.7 ISBE ISBE4 ISL L9 QSB3.3 QSB6.7 QSG12 (SKU: ESY77109).
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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.
