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Denso 234-9109 Air / Fuel Ratio Sensor - Upstream
| Brand | Denso 234-9109 |
|---|---|
| Position | Upstream |
| Grade Type | Regular |
| Sensor Type | Heated |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Wiring Harness Length | 12.60 |
| Product line | OE Style |
| Fits | Subaru · 8 vehicles |
OE style replacement. Precision-built for exact replacement and a first-time fit.
Heated sensor. Helps the sensor reach operating temperature quickly.
4-wire design. Built with a dedicated wiring setup for reliable signal control.
Cross-references Bosch 18082, NTK 24851 and Subaru 22641AA610 for the same application. See all 5.
Denso OE Style Air/Fuel Ratio Sensor 234-9109
Denso 234-9109 is an OE Style heated air/fuel ratio sensor built for specific-fit Subaru applications. It is engineered and tested to OE standards for accurate replacement fitment, with a 4-wire design and a 12.60-inch wiring harness length for a direct-style installation.
Key Features
- OE Style replacement air/fuel ratio sensor
- Heated sensor design for faster operating readiness
- Specific fit for direct application matching
- 4-wire configuration
- 12.60-inch wiring harness length
- Regular grade type
Product Details
This Denso air/fuel ratio sensor is built for Subaru upstream applications where precise exhaust feedback is required for engine management. The part number 234-9109 is listed for 2011-2013 Subaru Forester, 2012-2014 Subaru Impreza, and 2013-2014 Subaru XV Crosstrek in the upstream position. Denso’s OE Style line focuses on exact replacement dimensions and first-time fit, making this sensor a practical choice for drivers replacing a worn or failing upstream air/fuel ratio sensor on Subaru Impreza, Forester, or XV Crosstrek models.
This part cross-references Bosch 18082 and NTK 24851 for the same application.
Common Problems This Sensor Can Address
- Check engine light related to air/fuel ratio sensor performance
- Rough idle caused by inaccurate exhaust feedback
- Reduced fuel control from a slow or failing upstream sensor
- Emission control faults tied to sensor response issues
- Driveability concerns on Subaru Impreza, Forester, or XV Crosstrek upstream applications
Installation Notes and Tips
Verify the upstream sensor location before installation and match the connector and wire count to the original part. Confirm the harness length and routing path against the factory layout to avoid strain on the lead. For best results, inspect the exhaust threads and surrounding wiring before installing the new sensor.
Quality Assurance
Denso manufactures and tests this OE Style sensor to strict original-equipment standards for replacement accuracy and fit. The 234-9109 is built as a specific-fit component for direct application matching on listed Subaru models.
| Year | Make | Model | Fuel Type | Position | Notes |
|---|---|---|---|---|---|
| 2014 | Subaru | Impreza | — | Upstream | OE Style |
| 2014 | Subaru | XV Crosstrek | GAS | Upstream | OE Style |
| 2013 | Subaru | Forester | — | Upstream | OE Style |
| 2013 | Subaru | Impreza | — | Upstream | OE Style |
| 2013 | Subaru | XV Crosstrek | — | Upstream | OE Style |
| 2012 | Subaru | Forester | — | Upstream | OE Style |
| 2012 | Subaru | Impreza | — | Upstream | OE Style |
| 2011 | Subaru | Forester | — | Upstream | OE Style |
| No rows match your filter. | |||||