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Walker 250-21014 Oxygen Sensor - Upstream
| Brand | Walker 250-21014 |
|---|---|
| Position | Upstream |
| Connector Gender | Female |
| Connector Shape | Radiused Polygon |
| Mounting Type | Threaded |
| Overall Length | 40.47 |
| Sensor Type | Non Heated |
| Thread Diameter | 18.0 |
| Universal Or Specific Fit | Specific |
| Wire Gauge Measurement | 20 |
| Wire Quantity | 1 |
| Wiring Harness Length | 36.93 |
| Product line | Walker Products OE |
| Fits | Mazda · 10 vehicles |
OE replacement. Engineered as an original-equipment-style sensor for specific applications.
Threaded mounting. Installs with a secure threaded connection for a straightforward replacement.
Non-heated sensor. Provides the diagnostic feedback the ECU needs to monitor emissions systems.
OE Oxygen Sensor for Mazda B2000 and B2200
Walker Products OE 250-21014 is a specific-fit oxygen sensor engineered for upstream placement on select Mazda trucks. Built for direct ECU feedback, it supports accurate air-fuel monitoring on 1986-1987 Mazda B2000 and 1987-1989 Mazda B2200 applications.
Key Features
- Specific-fit oxygen sensor for upstream installation
- Non-heated sensor design
- Threaded mounting with 18.0 mm thread diameter
- Female connector with radiused polygon shape
- 36.93 in. wiring harness length and 20-gauge wire
- Overall length: 40.47 in.
- Walker Products OE part number 250-21014
Product Details
Walker Products OE 250-21014 is part of the Walker Products OE line, which focuses on original-equipment-style replacement sensors for vehicle-specific applications. This oxygen sensor is built for upstream use and is matched to the required fitment position so the ECU receives the correct diagnostic feedback. For Mazda B2000 and Mazda B2200 owners, the correct upstream oxygen sensor helps maintain proper engine management data for the fuel system and emissions controls.
Walker Products has supplied engine management components since 1946 and manufactures sensors for application-specific fitment. The 250-21014 oxygen sensor is designed for direct replacement use on the listed Mazda B2000 and Mazda B2200 models, making it a practical choice when servicing an upstream sensor fault.
What It Helps Address
- Check engine light related to upstream oxygen sensor performance
- Poor engine operation caused by incorrect air-fuel feedback
- Increased fuel consumption from inaccurate sensor readings
- Higher exhaust emissions from a failing oxygen sensor
- Stored ECU fault codes tied to the sensor circuit or related systems
Installation Notes
Install this sensor in the upstream position only on the listed applications. Before replacement, inspect the sensor wiring harness and connector for physical damage, since damaged wiring can shorten service life and affect sensor output. Confirm the threaded mounting location and connector style match the vehicle before installation.
Fits 1986-1987 Mazda B2000, upstream. Fits 1987-1989 Mazda B2200, upstream.
Quality Assurance
Walker Products OE sensors are manufactured as application-specific replacement parts for the listed vehicle fitments and are produced under Automotive ISO9001/TS 16949 quality systems.
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1989 | Mazda | B2200 | 2.2L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 1989 | Mazda | B2200 | 2.2L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 1988 | Mazda | B2200 | 2.2L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 1988 | Mazda | B2200 | 2.2L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 1987 | Mazda | B2000 | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 1987 | Mazda | B2000 | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 1987 | Mazda | B2200 | 2.2L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 1987 | Mazda | B2200 | 2.2L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
| 1986 | Mazda | B2000 | 2.0L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products OE |
| 1986 | Mazda | B2000 | 2.0L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products OE |
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