2021 Freightliner MT45 Car Parts & Accessories

You have come to the right place if you need new or replacement parts for your 2021 MT45. Advance Auto carries over 69 aftermarket parts for your 2021 Freightliner MT45, along with original equipment manufacturer (OEM) parts. You will find amazing prices on 2021 MT45 Engine Parts and Exhaust Parts. Plus, our selection of 2021 Interior Products for your MT45 are some of the lowest in the market.

Find replacement parts and upgrades for your 2021 Freightliner MT45. Use our customer reviews of Performance and Racing Products parts and others, along with user ratings on the many of the products we offer. You won’t find an easier way to shop for 2021 Freightliner MT45 performance parts, 2021 Freightliner MT45 body parts, interior components, or any type of part for that matter. Get your MT45 upgraded or back in pristine shape by shopping Advance Auto Parts.

2021 MT45 Engine Parts

Customers frequently purchase these best-selling 2021 Freightliner MT45 Engine Parts.

Spartan – Engine Cylinder Head; GM 6.0/6.2 10-19 OHV Head (Part No.2CT13)

Engine Cylinder Head; GM 6.0/6.2 10-19 OHV Head

from

$651.99
Remanufactured Cylinder Heads are complete rebuild & include new valve stem seals, soft plugs & verified camshafts. All threads are checked and repaired if necessary. Cylinder Heads are packaged in heavy plastic to protect the unit.

Product Features:
  • All cylinder heads are both vacuum and pressure tested to verify valve seating, & integrity of water passages.
  • All cylinder heads are packaged in environmentally safe and recyclable containers that are the perfect size for returning your original core
  • All threads and machined surfaces are and repaired with technology that exceeds the original metal
  • Non-sealing iron surfaces painted to prevent oxidization
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Gates – Green Stripe½ Ring Retained Straight Turbocharger Hose (Part No.26201)

Green Stripe½ Ring Retained Straight Turbocharger Hose

from

$104.99
Product Features:
  • Four-layer silicone construction with aramid fiber reinforcement for maximum durability
  • Meets or exceeds OEM specifications
  • Temperature Range: -60 Deg. F to +500 Deg. F (-51 Deg. C to +260 Deg. C)
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2021 MT45 Belts and Hoses

Dayco – Poly Rib Belt HD Serpentine Belt; 83.07 Long, 8 Rib Count, Heavy Duty (Part No.5080830)

Poly Rib Belt HD Serpentine Belt; 83.07 Long, 8 Rib Count, Heavy Duty

from

$50.99
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
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Dayco – Poly Rib Belt Serpentine Belt; 98.5 Long, 6 Rib Count (Part No.5060985)

Poly Rib Belt Serpentine Belt; 98.5 Long, 6 Rib Count

from

$69.99
Constructed with aramid reinforced EPDM compounds, the Dayco poly-V serpentine belt delivers  more than just OE quality. Developed through extensive laboratory and road testing, the rib profile in this EPDM belt has been engineered to conform to high mile

Product Features:
  • Provides full coverage for today’s light-duty vehicle market, especially vehicles with troublesome drives
  • Engineered to help address noise issues caused by the belt drive 
  • Capable of handling more extreme temperatures and workloads
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Driveworks – Poly Rib Belt Serpentine Belt; 98.5 Long, 6 Rib Count (Part No.985K6)

Poly Rib Belt Serpentine Belt; 98.5 Long, 6 Rib Count

from

$55.99
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
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Gates – V-Ribbed (Heavy Duty) Serpentine Belt: 83.75" Long, 8 Rib Count, Exact Fit (Part No.K080830HD)

V-Ribbed (Heavy Duty) Serpentine Belt: 83.75" Long, 8 Rib Count, Exact Fit

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
  • Heavy-duty construction resists cracking and wear, even at extreme temperatures
  • Special compound provides unmatched flexibility, stability, load carrying capacity and belt life
  • Problem solver designed for the toughest applications
  • Consistently outperforms other heavy-duty serpentine belts on the market
  • Engineered to save your fleet money and reduce downtime
  • Tensioner Replacement is Recommended (if equipped)
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Driveworks – Poly Rib Belt HD Serpentine Belt; 83.07 Long, 8 Rib Count, Heavy Duty (Part No.830K8)

Poly Rib Belt HD Serpentine Belt; 83.07 Long, 8 Rib Count, Heavy Duty

from

$33.99
This Driveworks v-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 belt has been constructed and engineered to meet the stringent demands of today’s automotive drive systems. The Driveworks v-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
  • Meets OEM requirements
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Gates – Micro-V« Serpentine Drive Belt (Part No.K060984)

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:
  • 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 specifications from the Original Equipment Manufacturer
  • 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.
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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
  • Patented labyrinth seal prevents contamination of internal parts for maximum durability and service life
  • Long-lasting steel pulleys with dust shields 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 ┐ex-fatigue than ┐at-spring designs
  • Patented damping mechanism provides maximum stability, reducing vibration and increasing the life of the belt, tensioner and other accessory drive components
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Litens – Serpentine Belt Tensioner: 1 Piece (Part No.910588A)

Serpentine Belt Tensioner: 1 Piece

from

$156.99
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 one of the largest original equipment part suppliers to ensure proper form, fit, and performance.
  • Internal “round spring” technology to provide constant belt tension and alignment throughout its service life. The internal damping design provides quiet, smooth, system performance.
  • Heavy Duty Steel Pulley with a 6304 close tolerance ball bearing and Electro-deposited coating for superior corrosion resistance
  • Large pivot bushing
  • Installation instructions included
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Gates – V-Ribbed (Heavy Duty) Serpentine Belt: 98.95" Long, 6 Rib Count, Exact Fit (Part No.K060984HD)

V-Ribbed (Heavy Duty) Serpentine Belt: 98.95" Long, 6 Rib Count, Exact Fit

from

$70.99
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
  • Problem solver designed for the toughest applications
  • Consistently outperforms other heavy-duty serpentine belts on the market
  • Engineered to save your fleet money and reduce downtime
  • Tensioner Replacement is Recommended (if equipped)
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Dayco – Heavy Duty Serpentine Belt; 83.07 Long, 8 Rib Count (Part No.5080830SC)

Heavy Duty Serpentine Belt; 83.07 Long, 8 Rib Count

from

$61.99
Developed using real-world track data, the Dayco supercharger belt is engineered with a proprietary EPDM construction with aramid cords and either 8 or 10 ribs depending on application. This belt is designed for late model high-performance supercharged street cars like ZR1 Corvettes, Shelby Mustangs and SRT Hellcat applications and is part of a line of racing belts engineered to provide maximum performance under the most extreme conditions. Comprised of specially blended compounds that are application specific, these belts are some of the strongest, most flexible belts on the market today.

Product Features:
  • Aramid fiber loaded EPDM construction and high stiffness PET cords eliminate belt stretch 
  • Proven to provide extreme durability and reduced slip under high boost conditions 
  • Tested by top level Drag Pak competitors, including Watson Racing, using roots style superchargers 
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Gates – Micro-V« Serpentine Drive Belt (Part No.K080830)

Micro-V« Serpentine Drive Belt

from

$55.99
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 specifications from the Original Equipment Manufacturer
  • 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.
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Gates – Molded Heater Hose: EPDM, Direct Fit, 2" Inside Diameter (Part No.21571)

Molded Heater Hose: EPDM, Direct Fit, 2" Inside Diameter

from

$18.99
Gates Molded Coolant Hose is manufactured to fit specific applications. Similar to OEM specifications. Approved for marine applications.

Product Features:
  • Heat and ozone resistant cover.
  • Engineered to resist electrochemical degradation – the leading cause of hose failure.
  • Re-engineered materials resist vacuum collapse. This reduces the need for internal springs in many applications.
  • Meets SAE 20R4 and 20R3 Type EC Class D-1 and D-2 specifications.
  • Temperature Rating: -40° F to 275° F (-40° C to 135° C) in coolant hose applications.
  • Note: Gates recommends replacing standard worm drive and spring loaded clamps with Gates PowerGrip(R) SB Clamps each time a new coolant hose is installed.
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Gates – Green Stripe« 2-Ply Straight Coolant Hose (Part No.24232)

Green Stripe« 2-Ply Straight Coolant Hose

from

$2.99
Stick hose designed for demanding heavy-duty coolant/air applications. Approved for marine applications.

Product Features:
  • Cover marked in 1 in. increments to facilitate approximate cut lengths, allows ┐custom-fit” installations
  • Engineered with compounds that resist electrochemical degradation
  • Approved for marine applications
  • Exceeds SAE 20R1 Type EC (Class D-1 Tube, and cover, Standard Wall)
  • Temperature Range: -40 Deg. F to +257 Deg. F (-40 Deg. C to +125 Deg. C)
  • Note: For a maintenance free connection, use PowerGrip SB clamps
  • Caution: Do not use for fuel or oil transfer applications
  • PLEASE NOTE: Item is priced and sold by the inch. See store for details.
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Dayco – Straight Coolant Hose (Heavy-Duty 2-Ply) (Part No.77200GL)

Straight Coolant Hose (Heavy-Duty 2-Ply)

from

$1.79
Designed for a wide range of light and heavy duty truck applications where the radiator hose routing is relatively straight, Dayco Heavy Duty Straight Radiator Hose is made with the highest quality woven mesh fabric reinforcement, neoprene cover, and nitrile tube compounds to withstand the most corrosive elements in diesel engines: oil, coolants, coolant additives, and temperature ranges of -40 Degree F (-40 Degree C) to +212 Degree F (+100 Degree C). This hose meets SAE requirements J20R1, Class B Tube, Class C Cover, standard wall construction. Note: This hose is NOT suitable for fuel or oil transfer.

Product Features:
  • Meets SAE requirements J20R1, Class B Tube, Class C Cover, standard wall construction
  • Made with the highest quality woven mesh fabric reinforcement, neoprene cover, and nitrile tube compounds
  • Withstands the most corrosive elements in diesel engines: oil, coolants, and coolant additives
  • Performs well in temperature ranges of -40 Degree F (-40 Degree C) to +212 Degree F (+100 Degree C)
  • PLEASE NOTE: Priced and sold by inch. See store for details.
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