Walker 250-54120 Oxygen Sensor - Upstream

OE Oxygen Sensor for Nissan Upstream Applications

Walker Products OE Oxygen Sensor Part Number 250-54120 is an original-equipment-style replacement built for specific upstream applications. It is engineered to provide the ECU with the diagnostic feedback needed for proper fuel control and emissions monitoring on select Nissan Rogue and Nissan X-Trail models.

Key Features

• Walker Products OE line oxygen sensor for upstream placement
• Application-specific fitment for select Nissan Rogue and Nissan X-Trail vehicles
• Supports ECU feedback for air-fuel and emissions management
• Built for direct replacement use on the listed vehicle positions
• Walker Products Part Number 250-54120

Fitment Details

Fits 2018-2023 Nissan X-Trail, upstream.

Fits 2014-2017 Nissan Rogue, upstream. Fits 2018 Nissan Rogue, upstream.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What This Sensor Helps Address

• Check engine light or malfunction indicator light related to oxygen sensor performance
• Poor engine operation caused by incorrect air-fuel feedback
• Increased fuel consumption from inaccurate exhaust gas readings
• Higher exhaust emissions from a failing upstream sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle position before ordering, since this sensor is listed for upstream use only. Inspect the sensor wiring harness and connector for damage during diagnosis, and check for exhaust leaks or related system faults that can affect sensor readings. For 2018 Nissan Rogue applications, verify the exact build date and B1S1 notes shown in the fitment data.

Quality Assurance

Walker Products OE sensors are developed as OEM replacement parts for specific applications and fitment positions. Walker Products has operated since 1946 and is an Automotive ISO9001/TS 16949 certified company focused on engine management and fuel system components.