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

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

Idler Pulley, Dayco, 89009

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

Litens Idler/Tensioner Pulley: Direct Fit, Steel, 74mm Diameter, 900120A

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

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

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.
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Gates – Gates DriveAlign Belt Drive Idler/Tensioner Pulley, 38075 (Part No.38075)

Gates DriveAlign Belt Drive Idler/Tensioner Pulley, 38075

from

$88.99
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.
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Litens – Litens Idler/Tensioner Pulley: Direct Fit, Steel, 74mm Diameter, 900122A (Part No.900122A)

Litens Idler/Tensioner Pulley: Direct Fit, Steel, 74mm Diameter, 900122A

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

Litens Idler/Tensioner Pulley: Direct Fit, Steel, 75mm Diameter, 900041A

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

Litens Idler/Tensioner Pulley: Direct Fit, Thermoplastic, 76mm Diameter, 900027A

from

$27.99
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.
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Dayco No Slack Gold Label – Dayco No Slack Gold Label Serpentine Idler/Tensioner Pulley Steel, 74mm Dia., 39.25mm Width, Smooth, 89101 (Part No.89101)

Dayco No Slack Gold Label Serpentine Idler/Tensioner Pulley Steel, 74mm Dia., 39.25mm Width, Smooth, 89101

from

$44.99
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.
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Most Popular Belt Tensioner Pulley for 2003 Freightliner MT45s

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

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

Litens Idler/Tensioner Pulley: Direct Fit, Steel, 74mm Diameter, 900122A

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.
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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: Litens Idler/Tensioner Pulley: Direct Fit, Steel, 74mm Diameter, 900122A 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 8/2/26, it is a Belt Tensioner 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.