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Dayco 89072 Accessory Drive Belt Idler Assembly
| Brand | Dayco 89072 |
|---|---|
| 19 | |
| 60 | |
| Bearing Inner Diameter 1 | 25.7 |
| Bearing Inner Diameter 2 | 8.4 |
| Bearing Width | 18 |
| Belt Type | Serpentine |
| Groove Quantity | 4 |
| Material | Steel |
| Max Belt Width | 04 Rib |
| Number of Bearings | 1 |
| Fits | Volkswagen and Audi · 18 vehicles |
Steel construction. Provides a durable foundation for the accessory drive belt idler assembly.
Serpentine belt compatible. Works with 4-rib belt systems for smooth accessory drive operation.
Single-bearing design. Uses one bearing for reliable belt support and rotation.
Cross-references ACDelco 38068, CARQUEST 38068 and Duralast 231072 for the same application. See all 7.
Dayco 89072 Accessory Drive Belt Idler Assembly
The Dayco 89072 accessory drive belt idler assembly is built for serpentine belt routing in select Audi and Volkswagen applications. With a steel construction and a single bearing design, it supports stable belt tracking in the accessory drive system.
Compatible with 1997-2000 Audi A4, 1997-2001 Audi A4 Quattro, and 1998-2005 Volkswagen Passat applications, this idler assembly is a direct-fit service part for common belt drive maintenance. The Dayco 89072 is specified with a 4-rib belt profile, 18 mm bearing width, and bearing inner diameters of 25.7 mm and 8.4 mm.
Key Features
- Steel idler assembly for accessory drive belt service
- Serpentine belt type with 4-rib belt width specification
- Single-bearing design for belt support and routing
- Bearing width: 18 mm
- Bearing inner diameters: 25.7 mm and 8.4 mm
- Direct fit for select Audi A4, Audi A4 Quattro, and Volkswagen Passat models
Detailed Description
Dayco 89072 is an accessory drive belt idler assembly used to guide and maintain serpentine belt alignment in the engine accessory drive system. The steel body provides a durable mounting structure, while the integrated bearing helps the pulley rotate smoothly under belt load. This part is listed for 1997-2000 Audi A4, 1997-2001 Audi A4 Quattro, and 1998-2005 Volkswagen Passat applications, making it a practical replacement when servicing belt routing components on these vehicles. This part cross-references Gates 38068 for the same application.
Common Issues This Part Can Address
- Noise from a worn or rough idler bearing
- Belt misalignment in the accessory drive system
- Serpentine belt tracking problems
- Visible wear on the idler pulley surface
- Service replacement for aging belt drive components
Installation Notes and Tips
Inspect the serpentine belt, tensioner, and adjacent pulleys before installation. Confirm the belt rib count and pulley alignment match the vehicle’s accessory drive layout. For best results, replace worn belt drive components together when wear is present across multiple parts. Verify application by year, make, and model before ordering.
Quality Assurance
Dayco manufactures belt drive components for automotive service applications, and this idler assembly is built to match the listed fitment and dimensional specifications for the vehicles shown.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2005 | Volkswagen | Passat | 2.0L | L4 | N/A | — |
| 2005 | Volkswagen | Passat | 1.8L | L4 | N/A | — |
| 2004 | Volkswagen | Passat | 1.8L | L4 | N/A | — |
| 2003 | Volkswagen | Passat | 1.8L | L4 | N/A | — |
| 2002 | Volkswagen | Passat | 1.8L | L4 | N/A | — |
| 2001 | Audi | A4 Quattro | 1.8L | L4 | N/A | — |
| 2001 | Volkswagen | Passat | 1.8L | L4 | N/A | — |
| 2000 | Audi | A4 | 1.8L | L4 | N/A | — |
| 2000 | Audi | A4 Quattro | 1.8L | L4 | N/A | — |
| 2000 | Volkswagen | Passat | 1.8L | L4 | N/A | — |
| 1999 | Audi | A4 | 1.8L | L4 | N/A | — |
| 1999 | Audi | A4 Quattro | 1.8L | L4 | N/A | — |
| 1999 | Volkswagen | Passat | 1.8L | L4 | N/A | — |
| 1998 | Audi | A4 | 1.8L | L4 | N/A | — |
| 1998 | Audi | A4 Quattro | 1.8L | L4 | N/A | — |
| 1998 | Volkswagen | Passat | 1.8L | L4 | N/A | — |
| 1997 | Audi | A4 | 1.8L | L4 | N/A | — |
| 1997 | Audi | A4 Quattro | 1.8L | L4 | N/A | — |
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