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Walker 250-54033 Oxygen Sensor - Upstream
| Brand | Walker 250-54033 |
|---|---|
| Position | Upstream |
| Connector Gender | Female |
| Connector Shape | Radiused Polygon |
| Mounting Type | Threaded |
| Overall Length | 25.71 |
| Sensor Type | Heated |
| Thread Diameter | 18.0 |
| Universal Or Specific Fit | Specific |
| Wire Gauge Measurement | 20 |
| Wire Quantity | 4 |
| Wiring Harness Length | 22.17 |
| Product line | Walker Products OE |
| Fits | Mazda · 2 vehicles |
OE replacement. Engineered as a direct-fit oxygen sensor for specific applications.
Heated sensor. Delivers fast, accurate feedback to the ECU.
Threaded mount. Installs with a secure, factory-style connection.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Walker OE Oxygen Sensor for 2005 Mazda 6
Walker Products OE 250-54033 is a specific-fit heated oxygen sensor for the upstream position on select 2005 Mazda 6 California emissions ESV vehicles. It is built to deliver the ECU feedback needed for accurate fuel control and emissions monitoring.
Key Features
- Specific-fit oxygen sensor for the upstream location
- Heated sensor design for faster operating response
- 4-wire configuration with female radiused polygon connector
- 18.0 mm thread diameter and threaded mounting type
- 22.17 in. wiring harness length and 25.71 in. overall length
- Walker Products OE part number 250-54033
Product Details
Walker Products OE focuses on direct replacement engine management sensors engineered for application-specific fitment and ECU feedback. Part number 250-54033 is made for the upstream oxygen sensor position on the 2005 Mazda 6 with California emissions ESV equipment, making it a targeted replacement for vehicles that rely on precise exhaust-gas monitoring. The heated design helps the sensor reach operating temperature quickly, supporting stable signal output during normal driving and cold starts. If your Mazda 6 is showing an oxygen sensor fault, poor fuel economy, elevated emissions, or a malfunction indicator light, this sensor is the type of replacement used to restore proper feedback to the engine control system.
What It Helps Address
- Oxygen sensor fault codes stored in the ECU
- Rough engine operation related to incorrect air-fuel feedback
- Increased fuel consumption from inaccurate sensor readings
- Higher exhaust emissions from a failing upstream sensor
- Malfunction indicator light triggered by sensor performance issues
Installation Notes and Tips
Fits 2005 Mazda 6, upstream. Confirm California emissions ESV application before ordering, and inspect the sensor wiring harness and connector for heat damage, corrosion, or broken terminals before installation. Verify the threaded mounting location and connector style match the original part on your vehicle. This part number is 250-54033.
Quality Assurance
Walker Products OE sensors are developed as original-equipment-style replacements for specific vehicle applications. Walker Products has operated since 1946 and manufactures engine management components under ISO 9001/TS 16949 quality systems.
| Year | Make | Model | Transmission | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2005 | Mazda | 6 | Automatic | 2.3L | L4 | GAS | Upstream | Compatible with California-ESV vehicles, Upstream Oxygen Sensor; Walker Products OE |
| 2005 | Mazda | 6 | Automatic | 2.3L | L4 | GAS | Upstream | California emissions ESV vehicles oxygen sensor; Walker Products OE |
| No rows match your filter. | ||||||||