D13 MP7 AC Belt Tensioner - Continental OE 49601 Replaces 21454379

• Continental OE Quality: Authentic Original Equipment level part manufactured by Continental, ensuring the exact spring tension and damping required by the factory.
• Engine-Specific Fitment: Explicitly engineered for the 2008-2018 Volvo D13 and Mack MP7 engines, mounting perfectly to the Alternator and AC drive position.
• Direct OEM Replacement: Delivers a seamless, bolt-on installation as the exact factory replacement for highly searched Volvo OEM part numbers 21454379 and 23669027.
• Heavy-Duty Vibration Damping: Features advanced internal damping technology to absorb harsh torsional diesel vibrations, extending the life of your expensive serpentine belt and pulleys.
• Prevents Accessory Failure: Maintains constant, precise belt tension to eliminate slipping, preventing sudden losses of alternator charging power or air conditioning.

Stop chasing accessory belt squeals and prevent a total loss of your air conditioning and alternator power with this premium D13 MP7 AC Belt Tensioner distributed by 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 true Original Equipment (OE) level Continental Elite assembly, built to 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 this is a Continental OE component, it guarantees perfect belt alignment and maintains exact, constant tension, preventing the premature belt stretching and snapping that occurs with cheap, rigid aftermarket tensioners.

At FleetPro Parts & Tires, we know that your rig's uptime is non-negotiable. Don't gamble with "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 Gates 38671. Stick with Continental OE quality to ensure your accessory drive stays reliable and out of the shop.

Engine Fitment & Compatibility

This genuine Continental OE tensioner assembly features an exact-fit design intended strictly for the following commercial powerplants:

• Engine Application: Volvo D13 (12.8L) & Mack MP7 (10.8L)
• Year Range: 2008-2018 (Fits Volvo Gen 2 VNL/VNR & Mack platforms)
• Component Group: Engine Cooling, Air Conditioning & Alternator Drive
• Mount Position: Alternator and AC Mount Only

Direct Replacement & Cross-Reference Numbers:

This Continental OE tensioner serves as a direct exact-fit replacement for the following part numbers:

• Volvo / Mack OEM: 21454379, 23669027
• Continental / Contitech: 49601, 81649601
• Gates Interchange: 38671
• Dayco Interchange: 89477DAY

Technical Specifications

• Component Type: Automatic Belt Tensioner Assembly
• Application: Alternator & AC Drive Belt
• Weight: 1.0 lbs
• Condition: Brand New
• Product Level: OE (Original Equipment by Continental)
• Brand: Continental Elite (Distributed by FleetPro Parts & Tires)