Volvo VNL AC Belt Tensioner - 2018-2026 D13 D11 MP8 21454379 21422767

• Fleet Standard Reliability: Manufactured to strict aftermarket specifications to provide the perfect spring tension and alignment required for modern 2018-2026 heavy-duty Volvo D13 and Mack MP8 AC compressors.
• Complete Assembly: Arrives fully assembled with the heavy-duty housing, internal dampening spring, and a premium smooth pulley pre-installed for a true "bolt-on" installation.
• Eliminates Belt Slip: Restores proper tension to your air conditioning belt, instantly curing annoying under-hood squeals and preventing premature belt shredding or snapping.
• Rugged Construction: Built with a high-strength cast aluminum body that actively resists corrosion, intense engine heat, and the heavy vibrations of commercial over-the-road hauling.
• Cost-Effective Replacement: Delivers guaranteed performance as a seamless, budget-friendly alternative to expensive dealership parts like Volvo 21454379, 21422767, and Gates T38585.

Keep your Gen 3 cabin cool and your accessory drive running smoothly with this premium aftermarket Volvo VNL AC Belt Tensioner exclusively from FleetPro Parts & Tires. A weak, failing, or seized air conditioning belt tensioner will cause rapid belt wear, loud squealing under the hood, and a sudden loss of AC compressor function during the hottest days on the road. Manufactured to strict Fleet Standard specifications, this heavy-duty tensioner assembly provides the exact spring rate needed to keep your AC belt perfectly aligned and tensioned on late-model Volvo engines. We stock these heavily right here in our Hanover Park, Illinois warehouse to ensure lightning-fast shipping for fleets, diesel repair shops, and owner-operators nationwide.

Consistent Cooling: The Volvo VNL AC Belt Tensioner Advantage

This Volvo VNL AC Belt Tensioner is engineered specifically to handle the constant vibration and high RPMs of the modern Volvo D13 and Mack MP8 diesel engines (2018-2026 models). It features a rugged internal dampening spring that automatically adjusts to belt stretch, ensuring your air conditioning compressor receives maximum power transfer without slipping. Constructed from high-strength cast aluminum and equipped with a premium pre-installed idler pulley, this assembly is built to outlast cheaper, lightweight aftermarket alternatives.

At FleetPro Parts & Tires, we know that downtime simply isn't an option. Designed specifically for the updated accessory drives found on 2018-2026 Volvo VNL platforms and modern Mack trucks, this aftermarket tensioner acts as a direct, cost-effective drop-in replacement for highly searched factory numbers like Volvo 21454379, 21422767, and 23669027. Upgrade your PM service schedule by replacing this complete assembly to avoid costly roadside AC failures and snapped belts.

Vehicle Fitment & Compatibility

This heavy-duty aftermarket AC belt tensioner features an exact-fit design intended for the following late-model applications:

• Make/Model: Volvo VNL (Gen 3), VN, VHD Series
• Make/Model: Mack Trucks (Anthem, Granite, Pinnacle)
• Engine Compatibility: Volvo D11 & D13 Engines
• Engine Compatibility: Mack MP7 & MP8 Series Engines
• Year Range: 2018 - 2026
• Component Group: Air Conditioning / Accessory Drive System

Direct Replacement & Cross-Reference Numbers:

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

• Volvo / Mack OEM: 21454379, 21422767
• Volvo / Mack OEM: 23669027, 20762060, 21404578
• Gates / Aftermarket Interchange: T38585

Technical Specifications

• Component Type: AC Belt Tensioner Assembly (Includes Pulley)
• Tensioning Mechanism: Automatic Heavy-Duty Internal Spring
• Material: Cast Aluminum Housing with Steel Pulley
• Product Level: Fleet Standard Aftermarket
• Brand: FleetPro Parts & Tires