OE Quality
60-Day Returns

Walker 250-24871 Oxygen Sensor - Downstream
Overview of Walker Products OE Oxygen Sensor 250-24871
The Walker Products OE Oxygen Sensor 250-24871 is designed specifically for the Mazda CX-7, ensuring precise emission control and optimal engine performance. This heated oxygen sensor features a threaded mounting type and a radiused polygon male connector for secure installation.
- Heated oxygen sensor for accurate emissions monitoring
- Specific fit for Mazda CX-7 models
- 26.1-inch wiring harness length with 4 wires of 20 gauge
- Threaded mounting with 18.0 mm thread diameter
- Radiused polygon male connector for reliable connection
- Overall length of 29.65 inches for proper fitment
Detailed Product Description
The Walker Products OE line focuses on providing original equipment quality parts that meet or exceed OEM specifications. The 250-24871 oxygen sensor is a heated sensor type, which allows for faster warm-up times and improved fuel efficiency. It includes a 26.1-inch wiring harness with four 20-gauge wires, ensuring stable electrical signals and compatibility with the vehicle’s engine control unit. The sensor’s threaded mounting type with an 18.0 mm diameter allows for straightforward installation in the Mazda CX-7’s exhaust system. The radiused polygon male connector is designed to fit securely, reducing the risk of disconnection or signal loss.
Common Applications and Issues Addressed
- Helps maintain proper air-fuel mixture for efficient combustion
- Reduces harmful emissions by providing accurate oxygen level data
- Prevents engine performance issues related to faulty sensors
- Resolves check engine light triggers caused by oxygen sensor faults
- Improves fuel economy by ensuring correct sensor feedback
Installation Notes and Tips
When installing the Walker Products OE oxygen sensor 250-24871 on a Mazda CX-7, ensure the vehicle is cool to avoid burns. Use appropriate tools to remove the old sensor and avoid damaging the wiring harness. Confirm the connector’s radiused polygon shape and male gender match the vehicle’s harness for a secure fit. Thread the sensor carefully to avoid cross-threading and tighten to manufacturer torque specifications.
Quality Assurance and Warranty
Walker Products OE parts are manufactured to meet strict quality standards, ensuring reliable performance and durability. This oxygen sensor undergoes rigorous testing to comply with emission control requirements. While specific warranty details are not provided here, Walker typically offers coverage consistent with OEM replacement parts.
| Brand | Walker |
| Part Number | 250-24871 |
| Position | Walker Products OE, Downstream |
| Connector Gender | Male |
| Connector Shape | Radiused Polygon |
| Mounting Type | Threaded |
| Overall Length | 29.65 |
| Sensor Type | Heated |
| Thread Diameter | 18.0 |
| Universal Or Specific Fit | Specific |
| Wire Gauge Measurement | 20 |
| Wire Quantity | 4 |
| Wiring Harness Length | 26.1 |
This part fits 3 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2012 | Mazda | CX-7 | 2.5L | L4 | GAS | Downstream | Fits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products OE |
| 2011 | Mazda | CX-7 | 2.5L | L4 | GAS | Downstream | Fits downstream bank 1 sensor 2 on specific vehicle models.; Walker Products OE |
| 2010 | Mazda | CX-7 | 2.5L | L4 | GAS | Downstream | Fits downstream bank 1 sensor 2 on specific 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.