OE Quality
60-Day Returns

Walker 250-24765 Oxygen Sensor - Downstream or Upstream
Overview of Walker 250-24765 Oxygen Sensor for Saturn Astra
The Walker Products OE 250-24765 oxygen sensor is designed specifically for the Saturn Astra, ensuring precise emission control and optimal engine performance. This heated oxygen sensor features a threaded mounting type and a radiused polygon female connector for secure installation.
- Heated oxygen sensor with 4 wires for accurate readings
- Specific fitment for Saturn Astra models
- 16.26-inch wiring harness length for flexible placement
- Threaded mounting with 18.0 mm thread diameter
- Radiused polygon female connector for reliable connection
- Wire gauge measurement of 20 for durability and signal integrity
- Overall length of 19.8 inches for proper fit
Detailed Product Description
The Walker Products OE 250-24765 oxygen sensor is engineered to meet the exact specifications of the Saturn Astra. This heated sensor type improves warm-up time and provides accurate oxygen level readings to the engine control unit, helping maintain efficient fuel combustion and reduced emissions. The sensor includes a 16.26-inch wiring harness and four wires with a 20-gauge measurement, ensuring reliable electrical performance. Its radiused polygon female connector and threaded mounting with an 18.0 mm diameter allow for a secure and precise fit, minimizing installation issues and sensor movement.
Walker Products OE is a product line focused on delivering original equipment quality parts that match or exceed factory standards. This oxygen sensor is part of that line, providing a direct replacement that supports the emission control system of your Saturn Astra without modification.
Common Applications and Issues Addressed
- Restores accurate air-fuel ratio readings for improved engine efficiency
- Helps resolve rough idling caused by faulty oxygen sensors
- Reduces increased emissions and failed emissions tests
- Prevents engine hesitation and poor acceleration
- Eliminates check engine light triggers related to oxygen sensor faults
Installation Notes and Tips
- Ensure the vehicle is cool before sensor removal to avoid burns
- Use appropriate oxygen sensor socket for threaded installation
- Verify connector type matches the vehicle harness before installation
- Do not over-tighten the sensor; follow torque specifications
- Inspect wiring harness for damage before connecting
Quality Assurance and Warranty
Walker Products OE oxygen sensors are manufactured to meet strict quality standards, ensuring durability and reliable performance. The 250-24765 part number undergoes rigorous testing to comply with emission control requirements for the Saturn Astra. Warranty coverage details should be confirmed with the product documentation or supplier.
| Brand | Walker |
| Part Number | 250-24765 |
| Position | Walker Products OE, Downstream |
| Connector Gender | Female |
| Connector Shape | Radiused Polygon |
| Mounting Type | Threaded |
| Overall Length | 19.8 |
| Sensor Type | Heated |
| Thread Diameter | 18.0 |
| Universal Or Specific Fit | Specific |
| Wire Gauge Measurement | 20 |
| Wire Quantity | 4 |
| Wiring Harness Length | 16.26 |
This part fits 3 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2008 | Saturn | Astra | 1.8L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2008 | Saturn | Astra | 1.8L | L4 | GAS | Downstream | Fits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products OE |
| 2008 | Saturn | Astra | 1.8L | 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.