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Dayco 89451 Accessory Drive Belt Tensioner Assembly
| Brand | Dayco 89451 |
|---|---|
| Belt Type | Serpentine |
| Direction | Clock Wise |
| Number of Pulleys | 1 |
| Pulley 1 Diameter | 70 |
| Pulley 1 Flat | Y |
| Pulley 1 Width | 28 |
| Type | Automatic |
| Fits | Dodge, Freightliner, and Mercedes-Benz · 10 vehicles |
Automatic tensioner. Maintains proper serpentine belt tension for consistent drive performance.
Single-pulley design. Simplifies the accessory drive belt system with fewer moving parts.
Serpentine belt compatible. Built for smooth, reliable operation in accessory drive applications.
Cross-references CARQUEST 38415, Chrysler 5080243AA and Duralast 89451 for the same application. See all 6.
Accessory Drive Belt Tensioner for Serpentine Systems
Dayco 89451 is an automatic accessory drive belt tensioner assembly for serpentine belt systems. It is built for direct-fit service on select Dodge Sprinter 2500, Dodge Sprinter 3500, and Mercedes-Benz E320 applications, with OE-style pulley dimensions and clockwise operation.
Key Features
- Automatic accessory drive belt tensioner assembly
- Serpentine belt type
- Clockwise direction
- Single pulley design
- 70 mm pulley diameter with 28 mm width
- Flat pulley surface for belt tracking
Detailed Description
Dayco 89451 is an accessory drive belt tensioner assembly engineered for serpentine belt routing in select 2003-2006 Dodge Sprinter 2500, 2003-2006 Dodge Sprinter 3500, and 2005-2006 Mercedes-Benz E320 vehicles. The automatic tensioner helps maintain proper belt tension as the belt system operates, while the 70 mm flat pulley supports consistent belt contact in clockwise rotation. If you are replacing a worn Dayco 89451 tensioner on a Dodge Sprinter 2500, Dodge Sprinter 3500, or Mercedes-Benz E320, this part number is matched to the listed applications.
This part cross-references CARQUEST 38415 for the same application.
What This Part Helps Address
- Belt squeal caused by weak or inconsistent tension
- Serpentine belt tracking issues from a worn pulley surface
- Accessory drive noise from a failing tensioner bearing
- Belt flutter or vibration in the drive system
- Loss of proper belt tension on the accessory drive
Installation Notes and Tips
Verify belt routing and pulley alignment before installation. Inspect the serpentine belt, idler pulleys, and related accessory drive components at the same time, since wear in one part can affect the entire belt system. Confirm vehicle fitment by year, make, and model before ordering Dayco 89451.
Quality Assurance
Dayco is a recognized name in belt drive components, and this tensioner assembly is specified with the pulley size, width, and direction needed for the listed applications. Use the part number 89451 to confirm the correct replacement for your vehicle.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2006 | Dodge | Sprinter 2500 | — | — | N/A | — |
| 2006 | Dodge | Sprinter 3500 | — | — | N/A | — |
| 2006 | Mercedes-Benz | E320 | — | — | N/A | — |
| 2005 | Dodge | Sprinter 2500 | — | — | N/A | — |
| 2005 | Dodge | Sprinter 3500 | — | — | N/A | — |
| 2005 | Mercedes-Benz | E320 | 3.2L | L6 | N/A | — |
| 2004 | Dodge | Sprinter 2500 | — | — | N/A | — |
| 2004 | Dodge | Sprinter 3500 | — | — | N/A | — |
| 2003 | Dodge | Sprinter 2500 | — | — | N/A | — |
| 2003 | Dodge | Sprinter 3500 | — | — | N/A | — |
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