OE Quality
60-Day Returns

Walker 250-25012 Oxygen Sensor - Upstream
Overview of Walker 250-25012 Oxygen Sensor for Hyundai and Kia
The Walker 250-25012 oxygen sensor is designed specifically for select Hyundai and Kia models, including the Elantra, Spectra, and Spectra5. This heated oxygen sensor provides accurate emissions control data to optimize engine performance and reduce harmful exhaust emissions.
- Heated oxygen sensor with 5-wire configuration
- Specific fit for Hyundai Elantra, Kia Spectra, and Spectra5
- 19.21-inch wiring harness length for precise installation
- Threaded mounting type with 18.0 mm thread diameter
- Radiused polygon male connector for secure connection
- Wire gauge measurement of 20 for reliable signal transmission
- Overall length of 22.76 inches for proper fitment
Walker Products OE Line Details
This oxygen sensor is part of the Walker Products OE line, which focuses on providing original equipment quality parts that meet or exceed OEM specifications. The Walker Products OE line ensures compatibility and durability, making it suitable for emission control systems in Hyundai and Kia vehicles requiring precise sensor performance.
Product Features and Specifications
The Walker 250-25012 oxygen sensor features a heated sensor type that allows for faster warm-up times and improved accuracy in measuring oxygen levels in the exhaust gases. The 5-wire design supports both sensor heating and signal output, enhancing reliability. Its 19.21-inch wiring harness length and radiused polygon male connector ensure a secure and exact fit in the vehicle’s emission system. The threaded mounting type with an 18.0 mm diameter allows for straightforward installation in the designated sensor port.
Common Applications and Issues Addressed
- Helps maintain optimal air-fuel mixture for Hyundai Elantra and Kia Spectra models
- Reduces emissions by providing accurate oxygen level readings
- Prevents engine performance issues related to faulty oxygen sensors
- Addresses check engine light triggers caused by sensor failure
- Supports efficient fuel consumption and engine operation
Installation Notes and Tips
When installing the Walker 250-25012 oxygen sensor, ensure the vehicle is cool to avoid burns. Use the correct socket size for the 18.0 mm threaded sensor to prevent damage. Verify the radiused polygon male connector aligns properly with the vehicle harness to ensure a secure electrical connection. Avoid twisting or stretching the 19.21-inch wiring harness during installation to maintain sensor integrity.
Quality Assurance and Warranty
Walker Products OE oxygen sensors are manufactured to meet strict quality standards for durability and performance. While specific warranty details may vary, Walker typically offers coverage against defects in materials and workmanship. This oxygen sensor is engineered to provide consistent operation within the emission control system of Hyundai and Kia vehicles.
| Brand | Walker |
|---|---|
| Part Number | 250-25012 |
| Position | Walker Products OE, Upstream |
| Connector Gender | Male |
| Connector Shape | Radiused Polygon |
| Mounting Type | Threaded |
| Overall Length | 22.76 |
| Sensor Type | Heated |
| Thread Diameter | 18.0 |
| Universal Or Specific Fit | Specific |
| Wire Gauge Measurement | 20 |
| Wire Quantity | 5 |
| Wiring Harness Length | 19.21 |
This part fits 35 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2009 | Hyundai | Elantra | 2.0L | L4 | GAS | Upstream | To 04/03/2009; B1S1; Al 04/03/2009; Upstream; Walker Products OE |
| 2009 | Hyundai | Elantra | 2.0L | L4 | GAS | Upstream | To 04/03/2009; Al 04/03/2009; Upstream; B1S1; Walker Products OE |
| 2009 | Hyundai | Elantra | 2.0L | L4 | GAS | Upstream | To 04/03/2009; B1S1; Upstream; Walker Products OE |
| 2009 | Kia | Spectra | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2009 | Kia | Spectra | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 2009 | Kia | Spectra5 | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2009 | Kia | Spectra5 | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 2008 | Hyundai | Elantra | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2008 | Hyundai | Elantra | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 2008 | Kia | Spectra | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2008 | Kia | Spectra | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 2008 | Kia | Spectra5 | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2008 | Kia | Spectra5 | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 2007 | Hyundai | Elantra | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2007 | Hyundai | Elantra | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 2007 | Kia | Spectra | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2007 | Kia | Spectra | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 2007 | Kia | Spectra5 | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2007 | Kia | Spectra5 | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 2006 | Hyundai | Elantra | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2006 | Hyundai | Elantra | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 2006 | Kia | Spectra | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2006 | Kia | Spectra | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 2006 | Kia | Spectra5 | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2006 | Kia | Spectra5 | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 2005 | Hyundai | Elantra | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2005 | Hyundai | Elantra | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 2005 | Kia | Spectra | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2005 | Kia | Spectra | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 2005 | Kia | Spectra5 | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2005 | Kia | Spectra5 | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 2004 | Hyundai | Elantra | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2004 | Hyundai | Elantra | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 2004 | Kia | Spectra | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2004 | Kia | Spectra | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
* 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.