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Dorman 34278 A/C Compressor Bypass Pulley
| Brand | Dorman 34278 |
|---|---|
| Material | Aluminum bracket |
| Material | Plastic pulley |
| Outside Diameter | 4.63 |
| Mounting Hardware Included | No |
| Belt Type | Serpentine |
| Mounting Bracket Included | Yes |
| Compressor Type | 10s17e |
| Installation Instructions Included | No |
| Number of Pulleys Included | 1 |
| Package Contents | Bracket and pulleys |
| Fits | Dodge and Mitsubishi · 22 vehicles |
Cost-effective solution. Lets the original drive belt stay in use while bypassing an inoperable A/C compressor.
Aluminum bracket. With a plastic pulley for a lightweight, practical design.
Bracket included. Comes with pulleys for a complete bypass pulley assembly.
Cross-references Bosch 67308, Four Seasons 68308 and Four Seasons TSN1898 for the same application. See all 33.
Dorman 34278 A/C Compressor Bypass Pulley
Dorman 34278 is an A/C compressor bypass pulley for vehicles with an inoperable compressor, allowing the original serpentine drive belt to remain in use. It is a practical replacement for select Dodge Dakota, Dodge Ram 1500, and Mitsubishi Raider applications where the compressor is no longer functioning.
Key Features
- Aluminum bracket with a plastic pulley for a direct-fit bypass setup
- Built for serpentine belt systems
- Outside diameter measures 4.63 inches
- Includes the mounting bracket and pulley assembly
- Configured for 10S17E compressor applications
- Fits 2004-2007 Dodge Dakota, N/A
- Fits 2004-2007 Dodge Ram 1500, N/A
- Fits 2006-2009 Mitsubishi Raider, N/A
Detailed Description
This Dorman A/C compressor bypass pulley replaces the failed compressor’s belt path with a pulley assembly that keeps the OE serpentine belt routing in place. Part number 34278 is built with an aluminum bracket and plastic pulley, and it is intended for vehicles using a 10S17E compressor layout. For shoppers searching for a Dorman 34278 bypass pulley for Dodge Ram 1500, Dodge Dakota, or Mitsubishi Raider, this part provides a direct solution when the compressor is no longer serviceable.
This part cross-references Bosch 67308 for the same application.
What It Is Used For
- Restoring belt drive operation when the A/C compressor has seized or failed
- Maintaining serpentine belt routing after compressor removal or bypass
- Reducing the need to replace the full compressor assembly in certain repairs
- Addressing belt noise or drag caused by an inoperable compressor
- Supporting repair decisions on 2004-2007 Dodge Dakota, 2004-2007 Dodge Ram 1500, and 2006-2009 Mitsubishi Raider
Installation Notes and Tips
Verify compressor type 10S17E and confirm belt routing before installation. This assembly is for serpentine belt applications and includes the bracket and pulley; mounting hardware is not listed as included. No installation instructions are included, so compare the original layout and vehicle-specific routing before service. Confirm fitment for your exact year and model, especially on Dodge Dakota, Dodge Ram 1500, and Mitsubishi Raider applications.
Quality Assurance
Dorman manufactures replacement components for automotive repair applications with attention to OE-style fit and function. Part number 34278 is built as a service solution for bypassing an inoperable A/C compressor while keeping the drive belt system in operation.
| Year | Make | Model | Liters | Cylinders | Notes |
|---|---|---|---|---|---|
| 2009 | Mitsubishi | Raider | 3.7L | V6 | — |
| 2008 | Mitsubishi | Raider | 3.7L | V6 | — |
| 2007 | Dodge | Dakota | 3.7L | V6 | — |
| 2007 | Dodge | Dakota | 4.7L | V8 | — |
| 2007 | Dodge | Ram 1500 | 3.7L | V6 | — |
| 2007 | Dodge | Ram 1500 | 4.7L | V8 | — |
| 2007 | Mitsubishi | Raider | 3.7L | V6 | — |
| 2007 | Mitsubishi | Raider | 4.7L | V8 | — |
| 2006 | Dodge | Dakota | 3.7L | V6 | — |
| 2006 | Dodge | Dakota | 4.7L | V8 | — |
| 2006 | Dodge | Ram 1500 | 3.7L | V6 | — |
| 2006 | Dodge | Ram 1500 | 4.7L | V8 | — |
| 2006 | Mitsubishi | Raider | 3.7L | V6 | — |
| 2006 | Mitsubishi | Raider | 4.7L | V8 | — |
| 2005 | Dodge | Dakota | 3.7L | V6 | — |
| 2005 | Dodge | Dakota | 4.7L | V8 | — |
| 2005 | Dodge | Ram 1500 | 3.7L | V6 | — |
| 2005 | Dodge | Ram 1500 | 4.7L | V8 | — |
| 2004 | Dodge | Dakota | 3.7L | V6 | — |
| 2004 | Dodge | Dakota | 4.7L | V8 | — |
| 2004 | Dodge | Ram 1500 | 3.7L | V6 | — |
| 2004 | Dodge | Ram 1500 | 4.7L | V8 | — |
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