OE Quality
60-Day Returns

Standard Ignition AS401 Turbocharger Boost Sensor
Reliable Turbocharger Boost Sensor for Saab 9-3 and 9-3X
The Standard Ignition AS401 turbocharger boost sensor is designed specifically for Saab 9-3 and 9-3X models. This sensor plays a critical role in monitoring boost pressure to ensure optimal engine performance and efficiency.
- Compatible with Saab 9-3 and 9-3X vehicles
- Part number AS401 for precise identification
- Measures turbocharger boost pressure accurately
- Essential for air and fuel delivery system management
- Durable construction for consistent performance
Product Overview and Functionality
The Standard Ignition AS401 turbocharger boost sensor is an integral component within the air and fuel delivery system. It monitors the pressure generated by the turbocharger and sends this data to the engine control unit (ECU). Accurate boost pressure readings allow the ECU to adjust fuel injection and ignition timing, maintaining engine efficiency and preventing potential damage from overboost conditions. This sensor is engineered to meet the specifications required by Saab 9-3 and 9-3X models, ensuring compatibility and reliable operation.
Common Applications and Problem Resolution
- Helps resolve turbo lag and inconsistent boost pressure issues
- Prevents engine misfires related to incorrect boost readings
- Addresses poor fuel economy caused by faulty sensor data
- Reduces risk of engine knocking due to improper air-fuel mixture
- Supports smooth acceleration and overall engine responsiveness
Installation Notes and Tips
When installing the Standard Ignition AS401 turbocharger boost sensor, ensure the vehicle is turned off and cooled down. Locate the existing boost sensor on the intake manifold or turbocharger housing, depending on the Saab 9-3 or 9-3X model year. Disconnect the electrical connector carefully and remove the old sensor. Install the new sensor securely, reconnect the electrical plug, and verify all connections are tight. After installation, it is recommended to clear any diagnostic trouble codes and perform a test drive to confirm proper sensor operation.
Quality Assurance and Warranty Information
Standard Ignition manufactures the AS401 turbocharger boost sensor to meet OEM standards for fit, form, and function. Each sensor undergoes rigorous testing to ensure durability and accuracy under various operating conditions. While specific warranty details may vary, Standard Ignition typically offers a limited warranty covering defects in materials and workmanship to provide confidence in product reliability.
| Brand | Standard Ignition |
| Part Number | AS401 |
| Connector Gender | Female |
| Connector Type | Plug In |
| Terminal Gender | Male |
| Terminal Type | Blade |
This part fits 11 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2011 | Saab | 9-3 | N/A | |||
| 2011 | Saab | 9-3X | 2.0L | L4 | N/A | |
| 2010 | Saab | 9-3 | N/A | |||
| 2010 | Saab | 9-3X | 2.0L | L4 | N/A | |
| 2009 | Saab | 9-3 | N/A | |||
| 2008 | Saab | 9-3 | N/A | |||
| 2007 | Saab | 9-3 | N/A | |||
| 2006 | Saab | 9-3 | N/A | |||
| 2005 | Saab | 9-3 | N/A | |||
| 2004 | Saab | 9-3 | N/A | |||
| 2003 | Saab | 9-3 | N/A |
* 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.