OE Quality
60-Day Returns

Standard Ignition DV178 Diverter Valve
Overview of Standard Ignition Diverter Valve DV178
The Standard Ignition DV178 diverter valve is designed for reliable emission control in select Lexus and Toyota vehicles. This vacuum system component helps maintain proper engine performance by managing air flow within the emission system.
- Compatible with Lexus GX470 and Toyota 4Runner, Land Cruiser, Sequoia, and Tundra models
- Part number DV178 ensures precise fitment and function
- Essential component in the vehicle's vacuum emission control system
- Manufactured to meet OEM specifications for durability and performance
Detailed Product Description
The Standard Ignition DV178 diverter valve plays a critical role in the emission control vacuum system of various Lexus and Toyota vehicles. It regulates the flow of vacuum pressure to reduce emissions and support engine efficiency. This diverter valve is engineered to match original equipment standards, providing consistent operation and compatibility with the emission control system of the 4Runner, GX470, Land Cruiser, Sequoia, and Tundra. Using the correct part number DV178 ensures proper installation and system functionality.
Common Applications and Issues Addressed
- Helps prevent rough idling caused by vacuum leaks
- Reduces emission system error codes related to vacuum control
- Supports proper operation of the evaporative emission system
- Mitigates engine performance issues linked to faulty diverter valves
- Assists in maintaining compliance with emission regulations
Installation Notes and Tips
- Verify vehicle compatibility with Lexus GX470 or Toyota 4Runner, Land Cruiser, Sequoia, or Tundra before installation
- Ensure all vacuum lines are clean and free of damage prior to installing the DV178 diverter valve
- Follow manufacturer torque specifications when securing the valve
- Inspect related emission control components during replacement to avoid future issues
Quality Assurance and Warranty
Standard Ignition parts are manufactured to meet or exceed OEM standards, ensuring reliable performance and durability. The DV178 diverter valve undergoes rigorous quality control testing to maintain consistent function within the emission control system. Warranty coverage details are provided by Standard Ignition and typically cover defects in material and workmanship under normal use.
| Brand | Standard Ignition |
|---|---|
| Part Number | DV178 |
| Connector Shape | Oval |
| Hose Size - Inches | 3/4 |
| Hose Size - mm | Refer to Inches |
| Terminal Type | Blade |
This part fits 17 vehicles. Search below:
| 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 |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.