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Dayco 89615 Accessory Drive Belt Tensioner Assembly - Alternator and Power Steering or Main Drive
| Brand | Dayco 89615 |
|---|---|
| Position | Main Drive |
| Belt Type | Serpentine |
| Direction | Counter Clock Wise |
| Number of Pulleys | 1 |
| Pulley 1 Diameter | 70 |
| Pulley 1 Flat | Y |
| Pulley 1 Width | 26 |
| Type | Automatic |
| Fits | Rolls-Royce and BMW · 55 vehicles |
Automatic tensioner assembly. Maintains proper belt tension for consistent accessory drive performance.
Serpentine belt compatible. Built for serpentine belt systems with a single pulley design.
Single-pulley design. Uses one 70 mm flat pulley for smooth belt tracking.
Cross-references ACDelco 39148, BMW 11.28.7.505.224 and BMW 11.28.7.542.680 for the same application. See all 9.
Dayco 89615 Accessory Drive Belt Tensioner
The Dayco 89615 accessory drive belt tensioner assembly is an automatic serpentine belt tensioner built for select BMW and Rolls-Royce applications. It uses a single flat pulley with a 70 mm diameter and 26 mm width, with counter clockwise rotation for the specified drive layouts.
- Brand: Dayco
- Part number: 89615
- Accessory drive belt tensioner assembly for serpentine belt systems
- Automatic tensioner design for consistent belt load control
- Single pulley configuration
- Pulley 1 diameter: 70 mm
- Pulley 1 width: 26 mm
- Pulley 1 flat: Y
- Direction: Counter Clock Wise
This Dayco 89615 tensioner is used in accessory drive belt systems to maintain proper serpentine belt tension across the alternator, power steering, and main drive layouts found in BMW 745i, 745Li, 750i, 750Li, 760i, 760Li, 545i, 550i, 645Ci, 650i, X5, and Rolls-Royce Phantom applications. It cross-references ACDelco 39148 for the same application.
Fitment Details
- Fits 2004-2016 Rolls-Royce Phantom, Main Drive
- Fits 2006-2010 BMW 550i, N/A
- Fits 2006-2010 BMW 650i, N/A
- Fits 2006-2008 BMW 750i, N/A
- Fits 2006-2008 BMW 750Li, N/A
- Fits 2006-2008 BMW 760Li, Main Drive
- Fits 2003-2004 BMW 760Li, Main Drive
- Fits 2004-2006 BMW 760i, Main Drive
- Fits 2004-2006 BMW X5, Alternator and Power Steering
- Fits 2006 BMW X5, Main Drive
- Fits 2004-2005 BMW 545i, Main Drive
- Fits 2004-2005 BMW 645Ci, Main Drive
- Fits 2002-2005 BMW 745i, Main Drive
- Fits 2005 BMW 745Li, Main Drive
- Fits 2003 BMW 745Li, Main Drive
- Fits 2005 BMW 760Li, Alternator and Power Steering
- Fits 2004 BMW 745Li, Alternator and Power Steering
- Fits 2002 BMW 745Li, Alternator and Power Steering
Installation Notes
Verify pulley diameter, belt routing, and rotation direction before installation. Match the tensioner to the vehicle’s accessory drive layout, since BMW X5 and 7 Series applications can use different positions such as Main Drive or Alternator and Power Steering. Confirm the existing serpentine belt condition and inspect related pulleys for wear before replacing the tensioner.
Quality Assurance
Dayco manufactures accessory drive components for OE-style service replacement, with application-specific design details that support proper belt tracking and tension control. Confirm part number 89615 against the vehicle’s original tensioner specifications before installation.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2016 | Rolls-Royce | Phantom | — | — | Main Drive | — |
| 2015 | Rolls-Royce | Phantom | — | — | Main Drive | — |
| 2014 | Rolls-Royce | Phantom | — | — | Main Drive | — |
| 2013 | Rolls-Royce | Phantom | — | — | Main Drive | — |
| 2012 | Rolls-Royce | Phantom | — | — | Main Drive | — |
| 2011 | Rolls-Royce | Phantom | — | — | Main Drive | — |
| 2010 | BMW | 550i | 4.8L | V8 | N/A | — |
| 2010 | BMW | 650i | — | — | N/A | — |
| 2010 | Rolls-Royce | Phantom | — | — | Main Drive | — |
| 2009 | BMW | 550i | 4.8L | V8 | N/A | — |
| 2009 | BMW | 650i | — | — | N/A | — |
| 2009 | Rolls-Royce | Phantom | — | — | Main Drive | — |
| 2008 | BMW | 550i | 4.8L | V8 | N/A | — |
| 2008 | BMW | 650i | — | — | N/A | — |
| 2008 | BMW | 750i | 4.8L | V8 | N/A | — |
| 2008 | BMW | 750Li | 4.8L | V8 | N/A | — |
| 2008 | BMW | 760Li | — | — | Main Drive | — |
| 2008 | Rolls-Royce | Phantom | — | — | Main Drive | — |
| 2007 | BMW | 550i | 4.8L | V8 | N/A | — |
| 2007 | BMW | 650i | — | — | N/A | — |
| 2007 | BMW | 750i | 4.8L | V8 | N/A | — |
| 2007 | BMW | 750Li | 4.8L | V8 | N/A | — |
| 2007 | BMW | 760Li | — | — | Main Drive | — |
| 2007 | Rolls-Royce | Phantom | — | — | Main Drive | — |
| 2006 | BMW | 550i | 4.8L | V8 | N/A | — |
| 2006 | BMW | 650i | — | — | N/A | — |
| 2006 | BMW | 750i | 4.8L | V8 | N/A | — |
| 2006 | BMW | 750Li | 4.8L | V8 | N/A | — |
| 2006 | BMW | 760i | — | — | Main Drive | — |
| 2006 | BMW | 760Li | — | — | Main Drive | — |
| 2006 | BMW | X5 | 4.4L | V8 | Alternator and Power Steering | — |
| 2006 | BMW | X5 | 4.8L | V8 | Main Drive | — |
| 2006 | Rolls-Royce | Phantom | — | — | Main Drive | — |
| 2005 | BMW | 545i | — | — | Main Drive | — |
| 2005 | BMW | 645Ci | — | — | Main Drive | — |
| 2005 | BMW | 745i | — | — | Main Drive | — |
| 2005 | BMW | 745Li | — | — | Main Drive | — |
| 2005 | BMW | 760i | — | — | Main Drive | — |
| 2005 | BMW | 760Li | — | — | Alternator and Power Steering | — |
| 2005 | BMW | X5 | 4.4L | V8 | Alternator and Power Steering | — |
| 2005 | BMW | X5 | 4.8L | V8 | Alternator and Power Steering | — |
| 2005 | Rolls-Royce | Phantom | — | — | Main Drive | — |
| 2004 | BMW | 545i | — | — | Main Drive | — |
| 2004 | BMW | 645Ci | — | — | Main Drive | — |
| 2004 | BMW | 745i | — | — | Main Drive | — |
| 2004 | BMW | 745Li | — | — | Alternator and Power Steering | — |
| 2004 | BMW | 760i | — | — | Main Drive | — |
| 2004 | BMW | 760Li | — | — | Main Drive | — |
| 2004 | BMW | X5 | 4.8L | V8 | Alternator and Power Steering | — |
| 2004 | Rolls-Royce | Phantom | — | — | Main Drive | — |
| 2003 | BMW | 745i | — | — | Main Drive | — |
| 2003 | BMW | 745Li | — | — | Main Drive | — |
| 2003 | BMW | 760Li | — | — | Main Drive | — |
| 2002 | BMW | 745i | — | — | Main Drive | — |
| 2002 | BMW | 745Li | — | — | Alternator and Power Steering | — |
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