OE Quality
60-Day Returns

Walker 250-24366 Oxygen Sensor - Upstream or Upstream Front
Overview of Walker 250-24366 Oxygen Sensor for Mazda Vehicles
The Walker 250-24366 oxygen sensor is designed specifically for select Mazda models including the Miata, MPV, and Protege. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases effectively.
- Heated sensor type for faster response times
- Specific fit for Mazda Miata, MPV, and Protege models
- 15.87-inch wiring harness length for precise installation
- 20 gauge wire with 4-wire configuration
- Radiused polygon female connector for secure connection
- Threaded mounting type with 18.0 mm thread diameter
- Overall length of 19.41 inches for proper fitment
Detailed Product Description
This Walker Products OE oxygen sensor (part number 250-24366) is engineered to meet the exact specifications of Mazda Miata, MPV, and Protege vehicles. Featuring a heated sensor element, it provides quicker warm-up times compared to non-heated sensors, which helps reduce emissions during cold starts. The 4-wire design includes two wires for the heater circuit and two for the sensor signal, ensuring reliable operation and accurate data transmission to the engine control unit.
The sensor’s wiring harness length of 15.87 inches and overall length of 19.41 inches are tailored for a precise fit, minimizing installation challenges. The radiused polygon female connector offers a secure and corrosion-resistant connection, while the threaded mounting type with an 18.0 mm diameter allows for straightforward replacement without modifications.
Walker Products OE Brand Line Information
The Walker Products OE line focuses on delivering emission control components that meet or exceed original equipment specifications. This oxygen sensor is part of that line, ensuring compatibility and performance consistent with factory-installed parts. Using Walker Products OE parts helps maintain vehicle emissions compliance and engine efficiency.
Common Applications and Issues Addressed
- Restores accurate oxygen sensing for proper air-fuel mixture control
- Helps resolve rough idling and engine hesitation caused by faulty sensors
- Reduces increased emissions and failed emissions tests
- Prevents check engine light triggers related to oxygen sensor faults
- Improves fuel economy by providing precise exhaust gas readings
Installation Notes and Tips
When installing the Walker 250-24366 oxygen sensor, ensure the vehicle is cool to avoid burns. Use an oxygen sensor socket or appropriate tool to remove the old sensor carefully. Verify the connector type matches the vehicle harness before installation. Thread the sensor carefully to avoid cross-threading and torque to manufacturer specifications. The 15.87-inch wiring harness length allows for proper routing without strain.
Quality Assurance and Warranty
Walker Products OE oxygen sensors are manufactured to meet strict quality standards for durability and performance. This part number 250-24366 undergoes rigorous testing to ensure reliable operation in Mazda Miata, MPV, and Protege models. Warranty coverage details should be confirmed with the supplier or manufacturer.
| Brand | Walker |
|---|---|
| Part Number | 250-24366 |
| Position | Walker Products OE, Upstream |
| Connector Gender | Female |
| Connector Shape | Radiused Polygon |
| Mounting Type | Threaded |
| Overall Length | 19.41 |
| Sensor Type | Heated |
| Thread Diameter | 18.0 |
| Universal Or Specific Fit | Specific |
| Wire Gauge Measurement | 20 |
| Wire Quantity | 4 |
| Wiring Harness Length | 15.87 |
This part fits 16 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2005 | Mazda | Miata | 1.8L | L4 | GAS | Upstream | Turbo; B1S1; Upstream; Walker Products OE |
| 2005 | Mazda | Miata | 1.8L | L4 | GAS | Upstream | Upstream Turbo Oxygen Sensor for Bank 1 Sensor 1; Walker Products OE |
| 2004 | Mazda | Miata | 1.8L | L4 | GAS | Upstream | Turbo; B1S1; Upstream; Walker Products OE |
| 2004 | Mazda | Miata | 1.8L | L4 | GAS | Upstream | Upstream Turbo Oxygen Sensor for Bank 1 Sensor 1; Walker Products OE |
| 2001 | Mazda | MPV | 2.5L | V6 | GAS | Upstream Front | Non-Calif-ESV No Calif-ESV Upstream Front; Walker Products OE |
| 2001 | Mazda | MPV | 2.5L | V6 | GAS | Upstream Front | California-ESV Upstream Front Oxygen Sensor; Walker Products OE |
| 2001 | Mazda | MPV | 2.5L | V6 | GAS | Upstream Front | Fits non-California emissions vehicles upstream of catalytic converter.; Walker Products OE |
| 2001 | Mazda | Protege | 1.6L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 2001 | Mazda | Protege | 1.6L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 2000 | Mazda | MPV | 2.5L | V6 | GAS | Upstream Front | California-ESV Upstream Front Oxygen Sensor; Walker Products OE |
| 2000 | Mazda | MPV | 2.5L | V6 | GAS | Upstream Front | Non-Calif-ESV No Calif-ESV Upstream Front; Walker Products OE |
| 2000 | Mazda | MPV | 2.5L | V6 | GAS | Upstream Front | Fits non-California emissions vehicles upstream of catalytic converter.; Walker Products OE |
| 2000 | Mazda | Protege | 1.6L | L4 | GAS | Upstream | Compatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products OE |
| 2000 | Mazda | Protege | 1.6L | L4 | GAS | Upstream | California emissions ESV vehicles oxygen sensor; Walker Products OE |
| 1999 | Mazda | Protege | 1.6L | L4 | GAS | Upstream | Compatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products OE |
| 1999 | Mazda | Protege | 1.6L | L4 | GAS | Upstream | California emissions ESV vehicles oxygen sensor; 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.