Walker 250-54103 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Walker Products OE Oxygen Sensor for Nissan

Walker Products OE 250-54103 is a heated oxygen sensor built for specific upstream applications and ECU feedback requirements. It is engineered as an OE-style replacement for select Nissan and INFINITI vehicles, including Nissan Altima, Nissan Juke, Nissan NV2500, Nissan NV3500, and INFINITI G25.

The Walker Products OE line focuses on application-specific fitment and sensor position, helping maintain the diagnostic signal the engine control unit expects. Part number 250-54103 is a threaded, female-connector sensor with a 4-wire heated design for direct replacement in the listed upstream locations.

Key Features

• Heated oxygen sensor for upstream placement
• Specific fit design for the listed Nissan and INFINITI applications
• 4-wire configuration with female connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 12.32 in.
• Overall length: 15.87 in.
• Walker Products OE part number 250-54103

Product Details

Walker Products OE sensors are developed as original-equipment replacement parts for a wide range of vehicles worldwide. This oxygen sensor is built for the exact application and position required by the vehicle, helping the ECU receive the correct diagnostic feedback. For Nissan Altima, Nissan Juke, Nissan NV2500, Nissan NV3500, and INFINITI G25 applications, the correct upstream sensor position is important for accurate fuel control and emissions monitoring. Part number 250-54103 is designed around those requirements.

Walker Products has supplied engine management and oxygen/air-fuel sensors since 1946 and manufactures under ISO 9001 / TS 16949 quality systems. The Walker Products OE line is positioned for direct-fit replacement use where the sensor shape, connector style, and harness length must match the vehicle’s original setup.

Common Issues This Sensor May Address

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

Installation Notes

Before replacement, inspect the sensor wiring harness and connector for damage, since physical wear can shorten sensor life and affect operation. Confirm the vehicle’s upstream position, connector shape, wire count, and thread size before installation. This part is listed for specific fitment only, including Fits 2016-2018 Nissan Altima, upstream; Fits 2017 Nissan Juke, upstream; Fits 2012-2017 Nissan NV2500, upstream right and upstream left; Fits 2012-2017 Nissan NV3500, upstream right and upstream left; Fits 2013-2015 Nissan Altima, upstream; Fits 2011-2015 Nissan Juke, upstream; Fits 2015 Nissan Juke, upstream; and Fits 2011-2012 INFINITI G25, upstream right and upstream left.

Quality Assurance

Walker Products OE 250-54103 is manufactured as an OE replacement sensor under Walker Products’ ISO 9001 / TS 16949 quality framework. The brand’s long-running focus on engine management and emissions components supports consistent application-specific fitment for the listed Nissan Altima, Nissan Juke, Nissan NV2500, Nissan NV3500, and INFINITI G25 vehicles.