Walker 250-54104 Oxygen Sensor - Upstream Left or Upstream Right

Walker Products OE Oxygen Sensor for Infiniti

Walker Products OE Part Number 250-54104 is a heated oxygen sensor built for specific vehicle applications and exact mounting positions. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring on select Infiniti FX50 and QX70 models.

Key Features

• Heated oxygen sensor with specific fitment for the listed application
• Threaded mounting design with 18.0 mm thread diameter
• 4-wire configuration with female connector
• Radiused polygon connector shape for application-specific connection
• 16.26 in. wiring harness length and 20-gauge wire
• Overall length: 19.8 in.

Product Details

Walker Products OE focuses on original-equipment-style replacement sensors for vehicles that rely on precise exhaust feedback. Part number 250-54104 is designed for the upstream oxygen sensor location on the right or left side, depending on the vehicle application. Compatible With 2014 Infiniti QX70, upstream right; 2014 Infiniti QX70, upstream left; 2013 Infiniti FX50, upstream right; and 2013 Infiniti FX50, upstream left. This part number 250-54104 is a direct-fit option for drivers servicing Infiniti FX50 and Infiniti QX70 oxygen sensor faults.

Walker Products has supplied engine management and fuel system components since 1946 and builds OE replacement sensors for specific fitment positions. The Walker Products OE line is focused on application-matched sensors that deliver the diagnostic feedback required by the ECU.

Common Issues This Sensor May Address

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

Installation Notes and Tips

Install only in the listed upstream position for the correct Infiniti application. Before replacement, inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten service life. Verify the threaded mounting point and connector orientation match the original sensor before installation.

Quality Assurance

Walker Products OE sensors are manufactured as OE replacement parts for specific applications and fitment positions. The brand is ISO 9001/TS 16949 certified, supporting consistent production and application-specific design. This part cross-references no listed alternate part numbers for the same application.