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Denso 234-9138 Air / Fuel Ratio Sensor - Upstream
| Brand | Denso 234-9138 |
|---|---|
| Position | Upstream |
| Connector Gender | Male |
| Grade Type | Regular |
| Sensor Type | Heated |
| Thread Diameter | 0.708 |
| Universal Or Specific Fit | Specific |
| Wire Quantity | 4 |
| Wiring Harness Length | 12.91 |
| Product line | OE Style |
| Fits | Subaru and Volkswagen · 15 vehicles |
OE style replacement. Precision-built for exact replacement and a first-time fit.
Heated sensor. Engineered for reliable air-fuel ratio monitoring.
Specific fit with a male connector and 4-wire design.
Cross-references NTK 24851, Subaru 22641AA71A and Subaru 22641AA670 for the same application. See all 5.
OE-Style Air/Fuel Ratio Sensor
This Denso OE Style air/fuel ratio sensor is built for precise replacement in upstream emission control applications. It is a specific-fit, heated sensor with a 4-wire design and male connector, made to match the original configuration for a direct service replacement.
- OE Style replacement for accurate air/fuel monitoring
- Heated sensor design for faster operating temperature
- Specific fit for direct application matching
- 4-wire construction with male connector
- Wiring harness length: 12.91
- Thread diameter: 0.708
Denso OE Style Product Line
Denso OE Style parts are built to mirror original equipment fit and function. This line focuses on exact replacement geometry and application-specific design, which helps reduce guesswork when selecting an upstream air/fuel ratio sensor for Subaru and Volkswagen vehicles.
Fitment Details
Compatible With:
- Fits 2016-2017 Subaru Crosstrek, Upstream
- Fits 2014-2017 Subaru Forester, Upstream
- Fits 2015-2017 Subaru Impreza, Upstream
- Fits 2014-2015 Subaru XV Crosstrek, Upstream
- Fits 2014 Volkswagen Beetle, Upstream
This part cross-references Subaru (e.g., 22641AA71A, 22641AA670) for the same application.
What It Helps Address
- Incorrect air/fuel ratio sensor readings
- Upstream sensor fault codes
- Rough idle related to fuel mixture control
- Reduced fuel economy caused by inaccurate feedback
- Emission monitor failures tied to sensor performance
Installation Notes
Verify the upstream sensor location, connector style, wire count, and thread diameter before installation. Match the harness length and specific-fit configuration to the original sensor on the vehicle. For Subaru Crosstrek, Forester, Impreza, and XV Crosstrek applications, confirm the OE-style connector orientation before final tightening.
Quality Assurance
Denso manufactures and tests this sensor to OE standards for replacement accuracy and first-time fit. The part number 234-9138 is engineered as a direct-fit service component for the listed applications.
| Year | Make | Model | Submodel | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|
| 2017 | Subaru | Crosstrek | — | — | Upstream | OE Style |
| 2017 | Subaru | Forester | 2.5i | — | Upstream | OE Style |
| 2017 | Subaru | Forester | 2.5i Touring | — | Upstream | OE Style |
| 2017 | Subaru | Forester | 2.5i Premium | — | Upstream | OE Style |
| 2017 | Subaru | Forester | 2.5i Limited | — | Upstream | OE Style |
| 2017 | Subaru | Impreza | — | — | Upstream | OE Style |
| 2016 | Subaru | Crosstrek | — | — | Upstream | OE Style |
| 2016 | Subaru | Forester | — | — | Upstream | OE Style |
| 2016 | Subaru | Impreza | — | — | Upstream | OE Style |
| 2015 | Subaru | Forester | — | — | Upstream | OE Style |
| 2015 | Subaru | Impreza | — | — | Upstream | OE Style |
| 2015 | Subaru | XV Crosstrek | — | — | Upstream | OE Style |
| 2014 | Subaru | Forester | — | — | Upstream | OE Style |
| 2014 | Subaru | XV Crosstrek | — | ELECTRIC/GAS | Upstream | OE Style |
| 2014 | Volkswagen | Beetle | — | — | Upstream | OE Style |
| No rows match your filter. | ||||||