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Standard Ignition DV178 Diverter Valve
| Brand | Standard Ignition DV178 |
|---|---|
| Connector Shape | Oval |
| Hose Size - Inches | 3/4 |
| Hose Size - mm | Refer to Inches |
| Terminal Type | Blade |
| Fits | Lexus and Toyota · 17 vehicles |
Vacuum system part. Controls airflow in the emission system.
Oval connector. Blade terminals and 3/4-inch hose size.
Cross-references Standard Ignition DV178, 2-39493 and 7D1171 for the same application. See all 7.
Standard Ignition DV178 Diverter Valve
The Standard Ignition DV178 is a diverter valve for emission control vacuum systems on select Toyota and Lexus applications. It features an oval connector shape, a 3/4-inch hose size, and blade terminals for a direct-style electrical connection.
Key Features
- Part number DV178 diverter valve for emission control vacuum system service
- Oval connector shape for the specified vehicle connection style
- 3/4-inch hose size for the vacuum hose interface
- Blade terminal type for electrical hookup
- Fits 2005-2009 Lexus GX470, N/A
- Fits 2005-2009 Toyota 4Runner, N/A; Main Unit; Under Intake Manifold
- Fits 2006-2007 Toyota Land Cruiser, N/A; Main Unit; Under Intake Manifold
- Fits 2005-2007 Toyota Sequoia, N/A; Main Unit; Under Intake Manifold
- Fits 2005-2006 Toyota Tundra, N/A; Main Unit; Under Intake Manifold
Detailed Description
Standard Ignition DV178 is a replacement diverter valve used in emission control vacuum system service where the original valve routes vacuum as required by the vehicle’s control strategy. The oval connector shape, 3/4-inch hose size, and blade terminal design help match the original connection points on supported Toyota and Lexus models. This part cross-references 2-39493 and 7D1171 for the same application. Standard Ignition DV178 is listed for the main unit location under the intake manifold on select Toyota 4Runner, Land Cruiser, Sequoia, and Tundra models, as well as Lexus GX470 coverage.
What It Is Used For
- Restoring proper vacuum routing in the emission control system
- Replacing a diverter valve with damaged hose ports or electrical terminals
- Addressing vacuum-related drivability or emissions faults tied to valve operation
- Correcting fitment issues on under-intake-manifold main unit applications
- Servicing a failed DV178-style valve on Toyota and Lexus platforms
Installation Notes and Tips
Verify the connector shape, hose size, and terminal style against the original part before installation. On listed Toyota 4Runner, Land Cruiser, Sequoia, and Tundra applications, the valve is positioned as the main unit under the intake manifold, so access may require removal of intake-related components. Confirm all vacuum hose routing and electrical connections are secure after installation.
Quality Assurance
Standard Ignition supplies emission control and vacuum system components for service replacement applications. The DV178 is built to match the specified fitment and connection details for the listed Lexus and Toyota vehicles.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2009 | Lexus | GX470 | — | — | N/A | — |
| 2009 | Toyota | 4Runner | 4.7L | V8 | N/A | Main Unit; Under Intake Manifold |
| 2008 | Lexus | GX470 | — | — | N/A | — |
| 2008 | Toyota | 4Runner | 4.7L | V8 | N/A | Main Unit; Under Intake Manifold |
| 2007 | Lexus | GX470 | — | — | N/A | — |
| 2007 | Toyota | 4Runner | 4.7L | V8 | N/A | Main Unit; Under Intake Manifold |
| 2007 | Toyota | Land Cruiser | — | — | N/A | Main Unit; Under Intake Manifold |
| 2007 | Toyota | Sequoia | — | — | N/A | Main Unit; Under Intake Manifold |
| 2006 | Lexus | GX470 | — | — | N/A | — |
| 2006 | Toyota | 4Runner | 4.7L | V8 | N/A | Main Unit; Under Intake Manifold |
| 2006 | Toyota | Land Cruiser | — | — | N/A | Main Unit; Under Intake Manifold |
| 2006 | Toyota | Sequoia | — | — | N/A | Main Unit; Under Intake Manifold |
| 2006 | Toyota | Tundra | — | — | N/A | Main Unit; Under Intake Manifold |
| 2005 | Lexus | GX470 | — | — | N/A | — |
| 2005 | Toyota | 4Runner | 4.7L | V8 | N/A | Main Unit; Under Intake Manifold |
| 2005 | Toyota | Sequoia | — | — | N/A | Main Unit; Under Intake Manifold |
| 2005 | Toyota | Tundra | — | — | N/A | Main Unit; Under Intake Manifold |
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