2003 Freightliner MT45 Pulleys

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Keep Your 2003 Freightliner MT45 in Top Shape with a Quality Pulley

When it comes to maintaining or upgrading your 2003 Freightliner MT45, choosing high-quality parts is crucial for ensuring your vehicle stays in top shape, whether you’re tackling a repair or enhancing performance. At Advance Auto Parts, we know how important it is to find the right Pulley for your MT45. We currently carry a top Pulley in stock that is built to last. Whether you’re replacing a damaged Pulley or looking to upgrade, our selection for the 2003 Freightliner MT45 ensures you’ll find exactly what you need to keep your vehicle looking and performing its best.

Explore Related Parts

And while you’re here, don’t forget to check out related part categories like Belt Tensioners and Serpentine and V Belts to complete your upgrade or repair project. At Advance Auto Parts, we’re proud to offer the parts and expertise to keep your 2003 Freightliner MT45 running smoothly and looking great.

Essential 2003 Freightliner MT45 Pulleys

Gates – DriveAlign Belt Drive Idler/Tensioner Pulley (Part No.38009)

DriveAlign Belt Drive Idler/Tensioner Pulley

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$27.49
Gates is a leading manufacturer of Original Equipment (OE) idler pulleys. Gates DriveAlign(R) Idler Pulleys meet or exceed OE specifications. High quality, high strength bearings run cooler and last longer than original bearings. DriveAlign Idler Pulleys are built to last by resisting dirt, salt, and other under-hood contaminants. Designed for use on automobiles and light trucks as locked center tensioning, automatic belt tensioning and idler pulleys.

Product Features:
  • Constructed from steel and thermoplastic designed to strict manufacturing tolerances for high durability and quality performance.
  • Built to last with a superior resistance to dirt, salt, chemicals and other under-hood contaminants
  • Original equipment quality suitable for virtually all domestic or imported vehicles in the current vehicle fleet
  • The bearings meet or exceed OE standards with application-specific speed and load requirements, to withstand high temperatures under the hood.
  • High-quality bearings eliminate noise
  • Mounting hardware included for some popular applications
  • Reliable operation under severe conditions
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Litens – Idler/Tensioner Pulley: Direct Fit, Steel, 75mm Diameter (Part No.900041A)

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

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$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.

Product Features:
  • Manufactured by one of the world’s largest Original Equipment suppliers of accessory drive tensioners and pulleys.
  • Heavy Duty Steel Pulley
  • Precision steel stamping with close tolerance ball bearing pocket.
  • Electro-deposited coating (e-coat) for superior corrosion resistance.
  • Running surface designed and engineered for proper belt tracking.
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Litens – Idler Pulley: Direct Fit, Steel, 70mm Diameter, With Hardware (Part No.900882A)

Idler Pulley: Direct Fit, Steel, 70mm Diameter, With 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.
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Litens – Idler/Tensioner Pulley: Direct Fit, Steel, 74mm Diameter (Part No.900122A)

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

from

$58.99
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.
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Litens – Idler Pulley: Direct Fit, Steel, 90mm Diameter, With Hardware (Part No.900613A)

Idler Pulley: Direct Fit, Steel, 90mm Diameter, With 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 and 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
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Most Popular Idler Pulley for 2003 Freightliner MT45s

Enhance your 2003 Freightliner MT45 with this popular Idler Pulley we have in stock, for $58.99.

Litens – Idler/Tensioner Pulley: Direct Fit, Steel, 74mm Diameter (Part No.900122A)

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

from

$58.99
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

FAQs for 2003 Freightliner MT45 Pulleys

What’s the price range for 2003 Freightliner MT45 Pulleys?

We currently have just one Pulleys for the 2003 Freightliner MT45 in stock: Idler/Tensioner Pulley: Direct Fit, Steel, 74mm Diameter and it costs $58.99.

Does Advance Auto Parts sell Pulleys for other Freightliner MT45 model years?

Yes, we carry Pulleys for 11 model years of Freightliner MT45s between 1999 and 2025. The following model years are the most popular for Pulley purchases: 2017, 2009, 2006, 2005, 2004, 2002, 2001, 2000, and 1999.

Does Advance Auto Parts sell Pulleys for any other 2003 Freightliner models?

Yes. We stock Pulleys for 24 other popular 2003 Freightliner models. Some of the most popular are 2003 Sprinter 2500 Pulleys, 2003 Sprinter 3500 Pulleys, 2003 Century Class Pulleys, 2003 Columbia Pulleys, and 2003 M2 106 Pulleys.

What types of Pulleys do you sell for my 2003 Freightliner MT45?

We currently have just 1 Pulley in stock for a 2003 Freightliner MT45, and as of 6/2/26, it is an Idler Pulley.

Can I get help with 2003 Freightliner MT45 Pulley orders?

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

What is your return policy for Freightliner MT45 Pulleys?

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