Walker 250-21016 Oxygen Sensor - Upstream

Walker Products OE Oxygen Sensor 250-21016

Walker Products OE 250-21016 is a specific-fit oxygen sensor built for engine management systems that rely on accurate exhaust feedback. It is designed as an OE-style replacement for vehicles that use a non-heated, threaded sensor with a male radiused-polygon connector.

Key Features

• Specific-fit oxygen sensor for direct application matching
• Non-heated sensor design
• Threaded mounting type with 18.0 mm thread diameter
• 14.29 wiring harness length with 20-gauge wire
• Male connector with radiused polygon shape
• Overall length: 17.83

Product Details

Walker Products OE focuses on replacement sensors engineered for the original application, fitment position, and ECU feedback requirements. Part number 250-21016 is built for vehicles that need a non-heated oxygen sensor to report exhaust oxygen content to the engine control unit. That feedback helps the ECU manage fuel delivery and emissions control more accurately. If your vehicle is showing an oxygen sensor fault, poor fuel economy, elevated emissions, or a malfunction indicator light, this sensor is the type of replacement commonly used to restore proper signal input. It is a direct-fit option for drivers searching for an oxygen sensor for specific vehicle applications, including select make/model fitment needs.

What It Helps Address

• Oxygen sensor fault codes stored in the ECU
• Rough engine operation caused by inaccurate exhaust feedback
• Increased fuel consumption from incorrect air-fuel control
• Higher exhaust emissions
• Malfunction indicator light illumination

Installation Notes

Confirm the sensor type, connector shape, thread diameter, and harness length before installation. Inspect the wiring harness and connector for heat damage, corrosion, or broken terminals, since those issues can shorten sensor life and affect signal quality. This part uses a threaded mounting design and should be matched to the original sensor location and connector style on the vehicle. Fits specific applications for select make/model listings; verify the exact position and connector configuration before ordering. Fits select vehicle applications such as certain Honda Civic oxygen sensor replacement needs and other make/model-specific engine management setups where this exact sensor design is required.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and manufactures OE replacement sensors under ISO 9001/TS 16949 quality systems. The Walker Products OE line is focused on application-specific fitment and ECU-relevant feedback for modern emissions control systems. This part number is 250-21016.