Stop chasing accessory belt squeals and prevent a total loss of your air conditioning and alternator power with this premium aftermarket D13 MP7 AC Belt Tensioner manufactured for FleetPro Parts & Tires. When the internal spring or bearing in your tensioner begins to fail, your belt slips, causing poor alternator charging and weak AC performance. This is a heavy-duty assembly built to meet or exceed the exact factory specifications required for your high-torque Volvo or Mack engine. We stock these heavily right here in our Hanover Park, Illinois warehouse to ensure lightning-fast shipping for fleets, diesel shops, and owner-operators nationwide.
Flawless Accessory Drive: The D13 MP7 AC Belt Tensioner Advantage
This D13 MP7 AC Belt Tensioner is engineered specifically for the rigorous demands of the 2008-2018 Volvo D13 (12.8L) and Mack MP7 (10.8L) engine platforms. Designed explicitly for the Alternator and AC mounting positions, this tensioner features a heavy-duty internal damping mechanism that absorbs the brutal torsional vibrations of a modern diesel engine. Because it is built to strict OE standards, it guarantees perfect belt alignment and maintains exact, constant tension, preventing the premature belt stretching and snapping that occurs with cheap, rigid tensioners.
At FleetPro Parts & Tires, we know that your rig's uptime is non-negotiable. Don't gamble with inferior "will-fit" tensioners that lose their spring rate after a few months of heavy hauling. This unit serves as the direct factory replacement for highly searched OEM part numbers like Volvo 21454379 and 23669027, as well as aftermarket equivalents like Continental 49601 and Gates 38671. Stick with FleetPro's trusted aftermarket quality to ensure your accessory drive stays reliable and out of the shop.
Engine Fitment & Compatibility
This heavy-duty tensioner assembly features an exact-fit design intended strictly for the following commercial powerplants:
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Engine Application: Volvo D13 (12.8L) & Mack MP7 (10.8L)
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Year Range: 2008-2018 (Fits Volvo Gen 2 VNL/VNR & Mack platforms)
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Component Group: Engine Cooling, Air Conditioning & Alternator Drive
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Mount Position: Alternator and AC Mount Only
Direct Replacement & Cross-Reference Numbers:
This premium aftermarket tensioner serves as a direct exact-fit replacement for the following part numbers:
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Volvo / Mack OEM: 21454379, 23669027
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Continental / Contitech: 49601, 81649601
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Gates Interchange: 38671
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Dayco Interchange: 89477DAY
Technical Specifications
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Component Type: Automatic Belt Tensioner Assembly
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Application: Alternator & AC Drive Belt
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Weight: 1.0 lbs
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Condition: Brand New
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Product Level: Premium Aftermarket (Meets or Exceeds OE Specs)
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Brand: FleetPro Parts & Tires
Cross references: 20762060 • 21404578 • 21422767 • 21454379 • 23669027 • 38671 • 49601 • 81649601 • T38585 • Dayco 89457 • Gates 38585 • Volvo 20935523 • Volvo 8149855 • Freightliner 42034121
