2025 Freightliner MT45 Belts and Hoses

Essential Belts and Hoses for 2025 Freightliner MT45s

Litens – Idler/Tensioner Pulley: Direct Fit, Steel, 75mm Diameter (Part No.900041A)

Idler/Tensioner Pulley: Direct Fit, Steel, 75mm Diameter

from

$57.99
This pulley is supplied by Litens Automotive – inventor of the first automatic belt tensioner in 1979 and today the world’s largest supplier of Original Equipment (O.E.) belt tensioning and routing products. This pulley is produced for serpentine belt routing applications and as the pulley component on automatic tensioner applications. This pulley conforms to original equipment material, tolerances, and specifications. The part meets all performance and durability requirements. Fits Heavy Duty truck applications including Freightliner, Kenworth, Peterbilt, Sterling, and Western Star. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.
See More

Litens – Idler Pulley: Direct Fit, Steel, 70mm Diameter, w/ Hardware (Part No.900882A)

Idler Pulley: Direct Fit, Steel, 70mm Diameter, w/ Hardware

from

$40.99
This pulley is manufactured by Litens Automotive the inventor of the first automatic belt tensioner in 1979 and today the world’s largest supplier of Original Equipment (O.E.) belt tensioning and routing products. This pulley is produced for serpentine belt routing applications for newer Buick 2.0L and 2.4L engine applications. This pulley conforms to original equipment material, tolerances, and specifications. The part is produced based on the O.E. specified design and meets all performance and durability requirements. Heavy duty steel construction for long life and trouble-free performance. Applications include G.M.. This pulley assembly Includes a new mounting bolt as well as a new washer/dust shield for ease of installation. Crosses to OE# 12605492 and others. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:
  • Manufactured by Litens, the largest original equipment tensioner and pulley supplier in the world, to ensure proper form, fit, and performance.
  • Heavy Duty Steel Pulley with close tolerance ball bearing pocket and Electro-deposited coating for superior corrosion resistance.
  • Includes all mounting hardware – Bolt and large metal dust shield.
  • Pulley Assemblies save time and ensure “like new” performance
  • Running surface designed and engineered for proper belt tracking.
  • 70.0mm O.D.; 16.0mm I.D; 30.8mm smooth running surface; steel. For use with a 6- rib serpentine belt. Includes bolt, 2 dust shields, and retainer.
See More

Litens – Idler/Tensioner Pulley: Direct Fit, Thermoplastic, 76mm Diameter (Part No.900027A)

Idler/Tensioner Pulley: Direct Fit, Thermoplastic, 76mm Diameter

from

$24.99
This pulley is manufactured by Litens Automotive the inventor of the first automatic belt tensioner in 1979 and today the world’s largest supplier of Original Equipment (O.E.) belt tensioning and routing products. This pulley is produced for serpentine belt routing applications and as the pulley component on automatic tensioner applications. This pulley conforms to original equipment material, tolerances, and specifications. The part is made in Canada using the O.E. specified design and meets all performance and durability requirements. Heavy duty thermoplastic construction for long life and trouble-free performance. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:
  • Manufactured by Litens, the largest original equipment tensioner and pulley supplier in the world, to ensure proper form, fit, and performance.
  • Heavy Duty Glass Reinforced Polymer Pulley for optimized dimensional control and running surface durability
  • OE-spec sealed ball bearings with synthetic grease and double lip seals for long life
See More

Litens – Idler/Tensioner Pulley: Direct Fit, Steel, 74mm Diameter (Part No.900120A)

Idler/Tensioner Pulley: Direct Fit, Steel, 74mm Diameter

from

$49.99
This pulley is designed and engineered by Litens Automotive the inventor of the first automatic belt tensioner in 1979 and today the world’s largest supplier of Original Equipment (O.E.) belt tensioning and routing products. This pulley is produced for serpentine belt routing applications and as the pulley component on automatic tensioner applications. This pulley conforms to original equipment material, tolerances, and specifications. The part is made using the O.E. specified design and meets all performance and durability requirements. Heavy duty steel construction for long life and trouble-free performance. Designed for HD truck applications. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:
  • Manufactured by one of the largest original equipment part suppliers in the world to ensure proper form, fit, and performance.
  • Forged Heavy Duty Steel Pulley designed to displace bearing heat. Precision machined face for smooth running surface. Tandem 6303 Ball Bearings for extended life.
  • Installation instructions included.
See More

Dayco – Idler Pulley, Dayco (Part No.89009)

Idler Pulley, Dayco

from

$24.99
Dayco idler/tensioner pulleys are built with smoother surfaces and tighter dimensional tolerances, which translates to less vibration and longer belt life. In addition to stamped, forged steel and powdered metal pulleys, Dayco also designs ultra-strong plastic pulleys with specially formulated glass-filled polymers that resist wear and tear. Premium lubricated ball bearings and double high temperature seals ensure peak bearing performance, the most critical element of a pulley’s service life.

Product Features:
  • Designed for the majority of automotive vehicle applications on the road today
  • High-quality materials help resist wear and improve belt life
  • Features premium lubricated bearings to extend service life
  • Meets or exceeds OE quality
See More

Litens – Idler Pulley: Direct Fit, Steel, 90mm Diameter, w/ Hardware (Part No.900613A)

Idler Pulley: Direct Fit, Steel, 90mm Diameter, w/ Hardware

from

$50.99
Litens Automotive is the original equipment supplier for the 2014-Present Chevrolet Silverado 1500/GMC Sierra 1500 4.3L (Lower-Idler) This replacement pulley was made by the same OE production supplier and therefore has the same performance characteristics as the original O.E. part. This pulley is produced for serpentine belt routing applications and is made of high strength steel for improved life and durability. Includes installation bolt, dust shield and double row ball bearing for extra strength and durability. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:
  • Manufactured by the Original Equipment supplier
  • Heavy Duty Steel Pulley with close tolerance two ball bearings in the pocket for extra strength anf durability. Is also has Electro-deposited coating for superior corrosion resistance.
  • Heavy duty polyacrylic seals and synthetic grease for added enhanced durability
  • Installation instructions included
See More

Dayco No Slack Gold Label – Serpentine Idler/Tensioner Pulley; Steel, 74mm Dia., 32.8mm Width, Smooth (Part No.89105)

Serpentine Idler/Tensioner Pulley; Steel, 74mm Dia., 32.8mm Width, Smooth

from

$45.99
Designed to replace idler and tensioner pulleys for serpentine drives in heavy-duty diesel engine applications, Dayco HD idler/tensioner pulleys are machined from high-strength steel or powdered metal material to provide excellent wear resistance under harsh environments. Dual pressed-in bearings provide long bearing life and protection against the shock loads experienced by today’s diesel trucks.

Product Features:
  • Engineered for the demanding drive systems of today’s class 4-8 heavy-duty commercial trucks
  • Premium OE technology to ensure peak performance under extreme conditions
  • Utilizes 3D dimensional computer aided design (CAD) and finite element analysis (FEA) for optimal design and maximum structural integrity
  • Meets or exceeds OE quality
See More

Litens – Accessory Drive Belt Tensioner – Original Equipment Quality (Part No.910007A)

Accessory Drive Belt Tensioner - Original Equipment Quality

from

$184.99
This Heavy Duty Truck and Bus tensioner is designed and engineered by Litens – the world’s largest supplier of original equipment (O.E.) belt tensioners in the world. The Litens replacement part meets all form, fit, and performance characteristics of the original equipment part (with the exception of not having the car manufacturer’s logo or part number applied to the part). This part is manufactured to meet or exceed the performance and life specifications of the O.E. part. The part features a premium chrome-silicon steel spring, internal damping, a “lift-lug” feature for ease of installation, Tandem 6303 ball bearings, a molded locator pin for precise installation, and a forged steel pulley. Specifically designed for a wide variety of Trucks and Buses with a Cummins ISB (5.9L) engine. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:
  • Designed and engineered by the world’s largest Original Equipment supplier of accessory drive tensioners and pulleys.
  • Internal “round spring” technology to provide constant belt tension and alignment throughout its service life. The internal damping design provides quiet, smooth, system performance.
  • Installation instructions included.
  • Heavy Duty Electro-deposited coated (e-coat) Steel Pulley for superior corrosion resistance.
  • Professional Mechanics will change this tensioner in approx. 1/2 hour
  • Accessory drive belts and tensioners are manufactured with similar design life targets. Since belt removal is required to change the tensioner, replacing both will extend the system service life and lower labor costs versus individual replacement.
See More

Dayco No Slack Gold Label – Serpentine Belt Tensioner; 1 Piece, HD, Engineered To Handle Higher Torque (Part No.89478)

Serpentine Belt Tensioner; 1 Piece, HD, Engineered To Handle Higher Torque

from

$141.99
For heavy duty diesel engine accessory drive applications, Dayco’s HD automatic belt tensioner is designed to handle higher torque and power pulses. The heavy-duty cast aluminum body and pulley arms translate into extra strength and durability and the patented flat spring design prevents fluctuations to the tensioner body as its footprint doesn’t change when it’s under tension. This reduces the risk of belt noise and also helps avoid separation of the housing a key failure seen from competitive products. Dayco automatic belt tensioner H.D. also includes rugged pulleys with dual lifetime lubricated bearings to deliver long lasting, dependable service. Feature highly damped designs using a wave spring and a metal ring with a bonded polymeric surface that acts as a radial shock absorber for the tensioner arm while reducing contamination.

Product Features:
  • Designed to prevent fluctuations to the tensioner body for longer service life.
  • Reduces the risk of noise and helps avoid housing separation
  • Includes pulleys with lubricated bearings for longer lasting performance
  • Heavy-duty cast aluminum body and pulley arms translate into extra strength and durability
See More

Dayco No Slack Gold Label – HD TENSIONER (Part No.89940)

HD TENSIONER

from

$308.99
HD TENSIONER

Litens – Accessory Drive Belt Tensioner – Original Equipment Quality (Part No.999366A)

Accessory Drive Belt Tensioner - Original Equipment Quality

from

$69.99
This Litens supplied tensioner is manufactured to original equipment specifications. Heavy duty thermoplastic pulley construction ensures long life and trouble-free performance. This tensioner meets or exceeds all original equipment fit, form, and performance characteristics. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:
  • Heavy duty thermoplastic pulley construction
  • OE-spec sealed ball bearings with synthetic grease and double lip seals for long life
  • Installation instructions included
See More

Gates – FleetRunner Heavy-Duty Automatic Belt Drive Tensioner (Part No.38513)

FleetRunner Heavy-Duty Automatic Belt Drive Tensioner

from

$164.99
Gates is a global leader in Original Equipment (OE) System Design. With a full line of tensioners globally, you can count on Gates to supply premium quality DriveAlign Automatic Belt Tensioners you can depend on.

Product Features:
  • Optimized components for maximum strength and durability
  • Its patented design provides excellent belt alignment and tension, so drive life and efficiency are improved.
  • Patented labyrinth seal prevents contamination of internal parts for maximum durability and service life
  • Long-life steel pulleys with dust cover to protect internal bearings from contamination
  • Double row bearings carry more load and last up to 3X longer than two individual bearings
  • Chrome-silicone round torsion spring for less flex-fatigue than flat-spring designs
  • The patented damping mechanism ensures maximum stability, reduces vibration and extends the life of the belt, idler and other auxiliary transmission components
See More

Litens – Accessory Drive Belt Tensioner – Original Equipment Quality (Part No.910015A)

Accessory Drive Belt Tensioner - Original Equipment Quality

from

$175.99
This Heavy Duty Truck and Bus tensioner is designed and engineered by Litens – the world’s largest supplier of original equipment (O.E.) belt tensioners in the world. The Litens replacement part meets all form, fit, and performance characteristics of the original equipment part (with the exception of not having the car manufacturer’s logo or part number applied to the part). This part is manufactured to meet or exceed the performance and life specifications of the O.E. part. The part features a premium chrome-silicon steel spring, internal damping, a “lift-lug” feature for ease of installation, Tandem 6303 ball bearings, a molded locator pin for precise installation, and a forged steel pulley. Specifically designed for a wide variety of trucks and buses with a Detroit Diesel or Cummins engine. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:
  • Designed and engineered by the world’s largest Original Equipment supplier of accessory drive tensioners and pulleys.
  • Internal “round spring” technology to provide constant belt tension and alignment throughout its service life. The internal damping design provides quiet, smooth, system performance.
  • Installation instructions included.
  • Heavy Duty Electro-deposited coated (e-coat) Steel Pulley for superior corrosion resistance.
  • Professional Mechanics will change this tensioner in approx. 1/2 hour
  • Accessory drive belts and tensioners are manufactured with similar design life targets. Since belt removal is required to change the tensioner, replacing both will extend the system service life and lower labor costs versus individual replacement.
See More

Dayco No Slack Gold Label – Serpentine Belt Tensioner; 1 Piece, HD, Engineered To Handle Higher Torque (Part No.89482)

Serpentine Belt Tensioner; 1 Piece, HD, Engineered To Handle Higher Torque

from

$142.99
For heavy duty diesel engine accessory drive applications, Dayco’s HD automatic belt tensioner is designed to handle higher torque and power pulses. The heavy-duty cast aluminum body and pulley arms translate into extra strength and durability and the patented flat spring design prevents fluctuations to the tensioner body as its footprint doesn’t change when it’s under tension. This reduces the risk of belt noise and also helps avoid separation of the housing a key failure seen from competitive products. Dayco automatic belt tensioner H.D. also includes rugged pulleys with dual lifetime lubricated bearings to deliver long lasting, dependable service. Feature highly damped designs using a wave spring and a metal ring with a bonded polymeric surface that acts as a radial shock absorber for the tensioner arm while reducing contamination.

Product Features:
  • Designed to prevent fluctuations to the tensioner body for longer service life.
  • Reduces the risk of noise and helps avoid housing separation
  • Includes pulleys with lubricated bearings for longer lasting performance
  • Heavy-duty cast aluminum body and pulley arms translate into extra strength and durability
See More

Gates – FleetRunner Heavy-Duty Automatic Belt Drive Tensioner (Part No.38631)

FleetRunner Heavy-Duty Automatic Belt Drive Tensioner

from

$126.99
Gates is a global leader in Original Equipment (OE) System Design. With a full line of tensioners globally, you can count on Gates to supply premium quality DriveAlign Automatic Belt Tensioners you can depend on.

Product Features:
  • Optimized components engineered for maximum strength and durability
  • Patented design ensures superior belt alignment and tension, improving transmission cost-effectiveness and service life
  • The patented labyrinth seal prevents contamination of internal parts for maximum durability and life.
  • Long-life steel pulleys with dust cover to protect internal bearings from contamination
  • Double row bearings carry more load and last up to 3X longer than two individual bearings
  • Round chrome-silicone torsion spring for less fatigue than coil spring designs.
  • The patented damping mechanism ensures maximum stability, reduces vibration and extends the life of the belt, idler and other auxiliary transmission components
See More

Dayco No Slack Gold Label – Serpentine Belt Tensioner; 1 Piece, HD, Engineered To Handle Higher Torque (Part No.89455)

Serpentine Belt Tensioner; 1 Piece, HD, Engineered To Handle Higher Torque

from

$83.99
For heavy duty diesel engine accessory drive applications, Dayco’s HD automatic belt tensioner is designed to handle higher torque and power pulses. The heavy-duty cast aluminum body and pulley arms translate into extra strength and durability and the patented flat spring design prevents fluctuations to the tensioner body as its footprint doesn’t change when it’s under tension. This reduces the risk of belt noise and also helps avoid separation of the housing a key failure seen from competitive products. Dayco automatic belt tensioner H.D. also includes rugged pulleys with dual lifetime lubricated bearings to deliver long lasting, dependable service. Feature highly damped designs using a wave spring and a metal ring with a bonded polymeric surface that acts as a radial shock absorber for the tensioner arm while reducing contamination.

Product Features:
  • Designed to prevent fluctuations to the tensioner body for longer service life.
  • Reduces the risk of noise and helps avoid housing separation
  • Includes pulleys with lubricated bearings for longer lasting performance
  • Heavy-duty cast aluminum body and pulley arms translate into extra strength and durability
See More

Dorman – Automatic Belt Tensioner (Part No.419-375)

Automatic Belt Tensioner

from

$117.99
This accessory drive belt tensioner assembly is designed to match the fit of an original equipment assembly on specified vehicles. It is engineered to help ensure proper belt tension when an original belt is slipping, broken, or worn from fatigue.

Product Features:
  • Direct replacement – this accessory drive belt tensioner assembly is designed to match the fit of an original equipment assembly on specified vehicles
  • Ideal solution – engineered to help ensure proper belt tension when an original belt is slipping, broken, or worn from fatigue
  • Durable construction – designed and manufactured to strict specifications for reliable performance
  • Trustworthy quality – backed by a team of product experts in the United States and more than a century of automotive experience
See More

Gates – Micro-V Serpentine Drive Belt (Part No.K080575)

Micro-V Serpentine Drive Belt

from

$67.99
We are proud to offer this CARQUEST product line: CARQUEST Premium Serpentine Belts By Gates

Product Features:
  • The special belt construction eliminates belt noise, reduces tension loss, and solves problems in drive applications.
  • EPDM rubber constructions resist cracking on the surface of the ribs
  • Meets or exceeds all original equipment manufacturer specifications.
  • Replacement of the tensioner is recommended (if equipped)
See More

Gates – Micro-V Serpentine Drive Belt (Part No.K080680)

Micro-V Serpentine Drive Belt

from

$74.99
Import or domestic, car or truck, every vehicle can depend on the superior quality of Gates precision fit Micro-V belts. With advanced technology that matches the OE size, construction and materials, Gates Micro-V ensures optimal vehicle performance.

Product Features:
  • The special belt construction eliminates noise, reduces tension loss and solves transmission problems.
  • EPDM rubber constructions resist cracking on the rib surface
  • Meets or exceeds all specifications from the Original Equipment Manufacturer
  • It is recommended to replace the tensioner (if equipped)
  • Unique form grinding of each individual belt assures precise dimensional control.
  • Meets or exceeds SAE J1459, SAE J2432, and SAE J1596 specifications.
See More

Gates – FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt (Part No.K080751HD)

FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt

from

$68.99
Gates FleetRunner Micro-V Belts are designed for the toughest applications. FleetRunner construction provides superior flexibility, stability, load capacity, and unsurpassed belt life. Patented materials deliver peak performance at extreme prolonged operating temperatures, making this belt the ultimate problem solver. An advanced blend of EPDM rubber technology withstands the modern threats of deterioration from increased exposure to ozone and water-based coolants. FleetRunner does this all while providing the lowest cost per mile for fleets, including 3/4 and 1 ton pickups.

Product Features:
  • The patented material provides optimal performance at prolonged extreme operating temperatures.
  • Heavy-duty construction resists cracking and wear, even at extreme temperatures
  • Special compound provides unmatched flexibility, stability, load capacity and belt life
  • Problem solver designed for the toughest applications
  • Consistently outperforms other heavy-duty serpentine belts on the market
  • Designed to save your fleet’s money and reduce downtime
  • It is recommended to replace the tensioner (if equipped)
See More

Dayco – Poly Rib Belt HD Serpentine Belt; 57.5 Long, 8 Rib Count, Heavy Duty (Part No.5080575)

Poly Rib Belt HD Serpentine Belt; 57.5 Long, 8 Rib Count, Heavy Duty

from

$56.99
Produced for heavy-duty vehicles and buses with multiple accessories, Dayco HD poly-V belts are made from EPDM material to resist heat and are compliant with the latest standards, guaranteeing resistance, reliability, low noise and longer service life. Engineered for high torque and power pulses, these belts also feature specially treated cords within the belt to resist stretching and ensure length stability.

Product Features:
  • Engineered to handle operating conditions with temperatures up to 130°C (266°F)
  • Designed for multiple accessories such as A/C, power steering pumps, alternators and water pumps
  • Capable of delivering excellent performance in high torque and high power pulse applications
  • Specially formulated treated cord insures length and tension stability on heavy duty diesel engine drives for the life of the belt
See More

Dayco – Poly Rib Belt HD Serpentine Belt; 74.02 Long, 8 Rib Count, Heavy Duty (Part No.5080740)

Poly Rib Belt HD Serpentine Belt; 74.02 Long, 8 Rib Count, Heavy Duty

from

$63.99
Produced for heavy-duty vehicles and buses with multiple accessories, Dayco HD poly-V belts are made from EPDM material to resist heat and are compliant with the latest standards, guaranteeing resistance, reliability, low noise and longer service life. Engineered for high torque and power pulses, these belts also feature specially treated cords within the belt to resist stretching and ensure length stability.

Product Features:
  • Engineered to handle operating conditions with temperatures up to 130°C (266°F)
  • Designed for multiple accessories such as A/C, power steering pumps, alternators and water pumps
  • Capable of delivering excellent performance in high torque and high power pulse applications
  • Specially formulated treated cord insures length and tension stability on heavy duty diesel engine drives for the life of the belt
See More

Gates – Micro-V Serpentine Drive Belt (Part No.K080839)

Micro-V Serpentine Drive Belt

from

$77.99
Import or domestic, car or truck, every vehicle can depend on the superior quality of Gates precision fit Micro-V belts. With advanced technology that matches the OE size, construction and materials, Gates Micro-V ensures optimal vehicle performance.

Product Features:
  • Special belt construction eliminates belt noise, reduces tension loss and solves problem drive applications
  • EPDM rubber constructions resist cracking on the surface of the ribs
  • Meets or exceeds all OEM specifications
  • Replacement of the tensioner is recommended (if equipped)
  • Unique form grinding of each individual belt assures precise dimensional control.
  • Meets or exceeds SAE J1459, SAE J2432, and SAE J1596 specifications.
See More

Gates – FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt (Part No.K080575HD)

FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt

from

$88.99
Gates FleetRunner Micro-V Belts are designed for the toughest applications. FleetRunner construction provides superior flexibility, stability, load capacity, and unsurpassed belt life. Patented materials deliver peak performance at extreme prolonged operating temperatures, making this belt the ultimate problem solver. An advanced blend of EPDM rubber technology withstands the modern threats of deterioration from increased exposure to ozone and water-based coolants. FleetRunner does this all while providing the lowest cost per mile for fleets, including 3/4 and 1 ton pickups.

Product Features:
  • Patented material provides peak performance at prolonged extreme operating temperatures
  • Heavy-duty construction resists cracking and wear, even at extreme temperatures
  • Special compound provides unmatched flexibility, stability, load carrying capacity and belt life
  • Troubleshooting designed for the toughest applications
  • Consistently outperforms other heavy-duty coil belts on the market
  • Designed to save your fleet money and reduce downtime
  • It is recommended to replace the tensioner (if equipped)
See More

Driveworks – Poly Rib Belt Serpentine Belt; 37.01 Long, 4 Rib Count (Part No.370K4)

Poly Rib Belt Serpentine Belt; 37.01 Long, 4 Rib Count

from

$32.99
The Driveworks belt is designed to provide better belt-to-pulley contact. The specialized rubber compound incorporates a high temperature polymer formulated to maximize load carrying requirements and belt life. This Driveworks ribbed belt has been constructed and engineered to meet the stringent demands of today’s automotive drive systems. The Driveworks ribbed belt delivers long-lasting dependable belt life.

Product Features:
  • Constructed with heat and ozone resistant EPDM rubber
  • Fiber is added to the rib stock to reinforce the rubber and reduce noise from worn and misaligned pulleys
  • Made with treated polyester cord to reduce belt stretch
See More

Gates – Micro-V Serpentine Drive Belt (Part No.K080830)

Micro-V Serpentine Drive Belt

from

$60.99
Import or domestic, car or truck, every vehicle can depend on the superior quality of Gates precision fit Micro-V belts. With advanced technology that matches the OE size, construction and materials, Gates Micro-V ensures optimal vehicle performance.

Product Features:
  • Special belt construction eliminates belt noise, reduces tension loss and solves problem drive applications
  • EPDM rubber constructions resist cracking on the surface of the ribs
  • Meets or exceeds all original equipment manufacturer specifications.
  • Tensioner Replacement is Recommended (if equipped)
  • Unique form grinding of each individual belt assures precise dimensional control.
  • Meets or exceeds SAE J1459, SAE J2432, and SAE J1596 specifications.
See More

Dayco – Poly Rib Belt HD Serpentine Belt; 69.5 Long, 8 Rib Count, Heavy Duty (Part No.5080695)

Poly Rib Belt HD Serpentine Belt; 69.5 Long, 8 Rib Count, Heavy Duty

from

$62.99
Produced for heavy-duty vehicles and buses with multiple accessories, Dayco HD poly-V belts are made from EPDM material to resist heat and are compliant with the latest standards, guaranteeing resistance, reliability, low noise and longer service life. Engineered for high torque and power pulses, these belts also feature specially treated cords within the belt to resist stretching and ensure length stability.

Product Features:
  • Engineered to handle operating conditions with temperatures up to 130°C (266°F)
  • Designed for multiple accessories such as A/C, power steering pumps, alternators and water pumps
  • Capable of delivering excellent performance in high torque and high power pulse applications
  • Specially formulated treated cord insures length and tension stability on heavy duty diesel engine drives for the life of the belt
See More

Gates – Micro-V Serpentine Drive Belt (Part No.K060984)

Micro-V Serpentine Drive Belt

from

$52.99
Import or domestic, car or truck, every vehicle can depend on the superior quality of Gates precision fit Micro-V belts. With advanced technology that matches the OE size, construction and materials, Gates Micro-V ensures optimal vehicle performance.

Product Features:
  • Special belt construction eliminates belt noise, reduces tension loss and solves problem drive applications
  • EPDM rubber constructions resist cracking on the rib surface
  • Meets or exceeds all OEM specifications
  • Replacement of the tensioner is recommended (if equipped)
  • Unique form grinding of each individual belt assures precise dimensional control.
  • Meets or exceeds SAE J1459, SAE J2432, and SAE J1596 specifications.
See More

Upgrade your 2025 Freightliner MT45 with Top-Quality Belts and Hoses

When it comes to maintaining or upgrading your 2025 Freightliner MT45, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Freightliner or enhancing its overall performance, Belts and Hoses are key to keeping your MT45 functioning at its best. At Advance Auto Parts, we offer a wide selection of 8 Belts and Hoses for the 2025 Freightliner MT45, designed to meet your needs without breaking the bank. From Radiator Hose replacements to Belt Tensioners upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.

Affordable Prices and Wide Selection

Shopping for Belts and Hoses for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Belts and Hoses for your 2025 Freightliner MT45 at great prices. Our Belts and Hoses inventory for this model ranges from just $4.79 to $168.99, with an average price of $77.97. Our 8 Belts and Hoses in stock come from 2 trusted brands, so you’re sure to find the right part for your 2025 Freightliner MT45 without overspending.

Explore Related Parts and More

While you’re here, don’t forget to check out other essential categories that go hand in hand with Belts and Hose upgrades. Explore related part types like Performance and Racing Products, Filters and PCVs and more to make sure your 2025 Freightliner MT45 is always ready to roll. We’re committed to providing you with everything you need to keep your MT45 in top shape, all in one place. Start shopping confidently below for your 2025 Freightliner MT45!

Best-Selling Radiator Hoses for 2025 Freightliner MT45s

Enhance the driving experience in your Freightliner with 1 quality Radiator Hose components, starting at $4.79.

Gates – Green Stripe Heavy-Duty Straight Heater Hose (Sold by foot) (Part No.28441)

Green Stripe Heavy-Duty Straight Heater Hose (Sold by foot)

from

$4.79
Heavy-duty construction assures dependable operation in truck, bus and off-road equipment heater systems. For a maintenance free connection, install with Power-Grip SB clamps. Approved for marine applications.

Product Features:
  • Green strip construction offers the best cost per mile
  • Abrasion resistant cover
  • Engineered with materials to resist electrochemical degradation
  • Reduces water loss from water permeating the hose wall and cover
  • Exceeds SAE 20R1 Type EC (Class D-1 tube and cover Standard Wall)
  • Temperature Range: -40 Deg. F to +275 Deg. F (-40 Deg. C to +135 Deg. C)
  • Note: For a maintenance-free connection, use PowerGrip SB clamps
  • Caution: Do not use for fuel or oil transportation applications.
  • PLEASE NOTE: Item is priced and sold by the foot. See store for details.
See More

Most Popular 2025 Freightliner MT45 Belt Tensioners

Customize your Freightliner with 2 Belt Tensioners products like Belt Tensioner Assemblies, all priced under $168.99.

Gates – FleetRunner Heavy-Duty Automatic Belt Drive Tensioner (Part No.38702)

FleetRunner Heavy-Duty Automatic Belt Drive Tensioner

from

$166.99
Product Features:
  • Optimized components engineered for maximum strength and durability
  • Patented design provides superior belt alignment and tension for improved drive efficiency and life
  • The patented labyrinth seal prevents contamination of internal parts for maximum durability and life.
  • Long-life steel pulleys with dust cover to protect internal bearings from contamination
  • Double-row bearings carry more load and last up to 3 times longer than two individual bearings
  • Round chrome-silicone torsion spring for less fatigue than coil spring designs.
  • Patented damping mechanism provides maximum stability, reducing vibration and increasing the life of the belt, tensioner and other accessory drive components
See More

Litens – Accessory Drive Belt Tensioner – Original Equipment Quality (Part No.910588A)

Accessory Drive Belt Tensioner - Original Equipment Quality

from

$168.99
This Litens supplied tensioner is manufactured to original equipment specifications. Heavy duty steel pulley construction ensures long life and trouble-free performance. This tensioner meets or exceeds all original equipment fit, form, and performance characteristics. For maximum performance and durability, always use genuine Litens components. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:
  • Manufactured by Litens, the largest original equipment tensioner and pulley supplier in the world, to ensure proper form, fit, and performance.
  • Internal “round spring” technology to provide constant belt tension and alignment throughout its service life.
  • Heavy duty steel pulley construction
  • OE-spec sealed ball bearings with synthetic grease and double lip seals for long life
  • Installation instructions included
See More

Top Picks for 2025 Freightliner MT45 Pulleys

Upgrade Freightliner MT45s with top-quality Pulleys parts, including 2 OEM and aftermarket selections for your 2025 model.

Litens – Idler Pulley: Direct Fit, Steel, 70mm Diameter, w/ Hardware (Part No.900882A)

Idler Pulley: Direct Fit, Steel, 70mm Diameter, w/ Hardware

from

$40.99
This pulley is manufactured by Litens Automotive the inventor of the first automatic belt tensioner in 1979 and today the world’s largest supplier of Original Equipment (O.E.) belt tensioning and routing products. This pulley is produced for serpentine belt routing applications for newer Buick 2.0L and 2.4L engine applications. This pulley conforms to original equipment material, tolerances, and specifications. The part is produced based on the O.E. specified design and meets all performance and durability requirements. Heavy duty steel construction for long life and trouble-free performance. Applications include G.M.. This pulley assembly Includes a new mounting bolt as well as a new washer/dust shield for ease of installation. Crosses to OE# 12605492 and others. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:
  • Manufactured by Litens, the largest original equipment tensioner and pulley supplier in the world, to ensure proper form, fit, and performance.
  • Heavy Duty Steel Pulley with close tolerance ball bearing pocket and Electro-deposited coating for superior corrosion resistance.
  • Includes all mounting hardware – Bolt and large metal dust shield.
  • Pulley Assemblies save time and ensure “like new” performance
  • Running surface designed and engineered for proper belt tracking.
  • 70.0mm O.D.; 16.0mm I.D; 30.8mm smooth running surface; steel. For use with a 6- rib serpentine belt. Includes bolt, 2 dust shields, and retainer.
See More

Litens – Idler Pulley: Direct Fit, Steel, 90mm Diameter, w/ Hardware (Part No.900613A)

Idler Pulley: Direct Fit, Steel, 90mm Diameter, w/ Hardware

from

$50.99
Litens Automotive is the original equipment supplier for the 2014-Present Chevrolet Silverado 1500/GMC Sierra 1500 4.3L (Lower-Idler) This replacement pulley was made by the same OE production supplier and therefore has the same performance characteristics as the original O.E. part. This pulley is produced for serpentine belt routing applications and is made of high strength steel for improved life and durability. Includes installation bolt, dust shield and double row ball bearing for extra strength and durability. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:
  • Manufactured by the Original Equipment supplier
  • Heavy Duty Steel Pulley with close tolerance two ball bearings in the pocket for extra strength anf durability. Is also has Electro-deposited coating for superior corrosion resistance.
  • Heavy duty polyacrylic seals and synthetic grease for added enhanced durability
  • Installation instructions included
See More

In-Demand Serpentine and V Belts for 2025 Freightliner MT45s

Select from 3 premium Serpentine and V Belts parts for your 2025 Freightliner MT45, with prices ranging from $51.99 to $77.99.

Gates – FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt (Part No.K080830HD)

FleetRunner Heavy-Duty Micro-V Serpentine Drive Belt

from

$77.99
Gates FleetRunner Micro-V Belts are designed for the toughest applications. FleetRunner construction provides superior flexibility, stability, load capacity, and unsurpassed belt life. Patented materials deliver peak performance at extreme prolonged operating temperatures, making this belt the ultimate problem solver. An advanced blend of EPDM rubber technology withstands the modern threats of deterioration from increased exposure to ozone and water-based coolants. FleetRunner does this all while providing the lowest cost per mile for fleets, including 3/4 and 1 ton pickups.

Product Features:
  • Patented material provides peak performance at prolonged extreme operating temperatures
  • Construction resists cracking and wear, even at extreme temperatures
  • Special compound provides unmatched flexibility, stability, load carrying capacity and belt life
  • Troubleshooting designed for the toughest applications
  • Consistently outperforms other heavy-duty serpentine belts on the market
  • Designed to save your fleet money and reduce downtime
  • Tensioner Replacement is Recommended (if equipped)
See More

Gates – Micro-V Serpentine Drive Belt (Part No.K061045)

Micro-V Serpentine Drive Belt

from

$51.99
Import or domestic, car or truck, every vehicle can depend on the superior quality of Gates precision fit Micro-V belts. With advanced technology that matches the OE size, construction and materials, Gates Micro-V ensures optimal vehicle performance.

Product Features:
  • The special belt construction eliminates noise, reduces tension loss and solves transmission problems.
  • EPDM rubber constructions resist cracking on the rib surface
  • Meets or exceeds all OEM specifications
  • It is recommended to replace the tensioner (if equipped)
  • Unique form grinding of each individual belt assures precise dimensional control.
  • Meets or exceeds SAE J1459, SAE J2432, and SAE J1596 specifications.
See More

Gates – Micro-V Serpentine Drive Belt (Part No.K080830)

Micro-V Serpentine Drive Belt

from

$60.99
Import or domestic, car or truck, every vehicle can depend on the superior quality of Gates precision fit Micro-V belts. With advanced technology that matches the OE size, construction and materials, Gates Micro-V ensures optimal vehicle performance.

Product Features:
  • Special belt construction eliminates belt noise, reduces tension loss and solves problem drive applications
  • EPDM rubber constructions resist cracking on the surface of the ribs
  • Meets or exceeds all original equipment manufacturer specifications.
  • Tensioner Replacement is Recommended (if equipped)
  • Unique form grinding of each individual belt assures precise dimensional control.
  • Meets or exceeds SAE J1459, SAE J2432, and SAE J1596 specifications.
See More

FAQs for 2025 Freightliner MT45 Belts and Hoses

Which Belts and Hoses are best-sellers for 2025 Freightliner MT45s?

Out of 8 Belts and Hoses that fit 2025 Freightliner MT45s, the following parts are the top sellers:

What’s the price range for 2025 Freightliner MT45 Belts and Hoses?

Belts and Hose prices for the 2025 Freightliner MT45 start at $4.79 and go up to $168.99 for the most premium parts.

What’s the average price of a Belts and Hose for a 2025 Freightliner MT45?

The average price for Belts and Hoses for the 2025 Freightliner MT45 is $77.97. Keep in mind the variety of part types within our Belts and Hose category so you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Belts and Hoses for other Freightliner MT45 model years?

Yes, we currently carry Belts and Hoses for 26 model years of Freightliner MT45s between 1998 and 2024. Belts and Hoses are bought most frequently for the following model years: 2019, 2018, 2017, 2016, 2015, 2014, 2013, 2012, and 2011.

What are the cheapest Belts and Hoses for my 2025 Freightliner MT45?

The cheapest 2025 Freightliner MT45 Belts and Hoses we carry in stock are:

What types of Belts and Hoses do you sell for my 2025 Freightliner MT45?

As of 11/2/25, these are some of the most in-demand types of Belts and Hoses for a 2025 Freightliner MT45:

Can I get help with 2025 Freightliner MT45 Belts and Hose orders?

Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Freightliner Belts and Hoses and more.

What is your return policy for Freightliner MT45 Belts and Hoses?

Advance Auto Parts keeps returns simple. For new Freightliner MT45 Belts and Hoses and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.