Walker 250-21013 Oxygen Sensor - Downstream or Upstream

Walker Products OE Oxygen Sensor for Nissan and Jaguar

Walker Products OE Part Number 250-21013 is a specific-fit oxygen sensor built for upstream applications on select Nissan and Jaguar vehicles. It is designed to provide the ECU with the exhaust feedback needed for fuel control and emissions monitoring, making it a direct replacement choice for diagnosing sensor-related drivability and MIL concerns.

Key Features

• Specific-fit oxygen sensor for targeted vehicle applications
• Non-heated sensor design
• Upstream mounting position
• Threaded installation with 18.0 mm thread diameter
• Female connector with radiused polygon shape
• 8.19 in. wiring harness length and 20-gauge wire
• Overall length: 11.73 in.

Walker Products OE Product Line

Walker Products OE focuses on original-equipment-style engine management and oxygen/air-fuel sensors for application-specific fitment. Part number 250-21013 is built for the correct position and vehicle calibration needs, helping maintain the diagnostic feedback expected by the ECU on older Nissan and Jaguar platforms.

Detailed Description

This Walker Products OE oxygen sensor is engineered as a replacement for select upstream locations on Nissan 200SX, Altima, Pickup, Sentra, 240SX, D21, NX, Pulsar NX, Maxima, 280ZX, Pathfinder, 720, Pulsar, 810, and Jaguar XJ6 and Vanden Plas applications. It is a non-heated, threaded sensor with a female connector and vehicle-specific harness configuration, making it a fitment-focused solution for restoring exhaust oxygen signal input on the correct bank and sensor position. Walker Products OE 250-21013 is intended for vehicles where the upstream sensor is used for fuel mixture control and emissions feedback.

This part cross-references OEM-style applications for the same vehicle coverage, including Nissan and Jaguar fitments listed above.

What It Is Used For

• Replacing a failed upstream oxygen sensor
• Addressing check engine light concerns tied to oxygen sensor faults
• Restoring proper ECU feedback for air-fuel control
• Correcting poor fuel economy caused by inaccurate exhaust readings
• Helping reduce elevated exhaust emissions from sensor-related issues

Installation Notes and Tips

Verify the vehicle’s emissions configuration, build date, and sensor position before ordering, especially on 1994-1996 Nissan applications with California and non-California emissions differences. Confirm the connector shape, thread diameter, and harness routing match the original sensor. Inspect the wiring harness and connector for heat damage, corrosion, or physical wear before installation, since damaged wiring can shorten sensor life and affect signal quality.

Quality Assurance

Walker Products has manufactured engine management and fuel system components since 1946 and operates as an ISO 9001/TS 16949 certified company. Part number 250-21013 is produced as an OE-style replacement sensor for application-specific fitment and diagnostic performance.