Walker 250-54117 Oxygen Sensor - Upstream Left or Upstream Right

OE Oxygen Sensor for Nissan Z and INFINITI

Walker Products OE 250-54117 is a heated oxygen sensor built as a specific-fit replacement for select Nissan Z and INFINITI applications. It is engineered to deliver the ECU feedback needed for accurate fuel control and emissions monitoring on upstream right and upstream left positions where listed.

Walker Products OE focuses on application-specific engine management sensors for direct replacement use. Part number 250-54117 follows the vehicle position and connector requirements for the listed INFINITI Q50, INFINITI Q60, and Nissan Z fitments, helping maintain proper sensor signal response in the exhaust stream.

Key Features

• Heated oxygen sensor design for faster operating temperature
• Specific fit for listed upstream right and upstream left applications
• 4-wire configuration with male connector
• 18.00 mm thread diameter
• 9.37 in. wiring harness length and 12.91 in. overall length
• Walker Products OE part number 250-54117

Detailed Description

This Walker Products oxygen sensor is designed for direct replacement on 2023-2025 Nissan Z upstream right, 2022-2024 INFINITI Q50 upstream right, 2022 INFINITI Q60 upstream right, and select 2016-2021 INFINITI Q50 and 2017-2021 INFINITI Q60 upstream left or upstream right positions. As an OE-style engine management sensor, it supports the feedback loop the ECU uses to monitor exhaust oxygen content and adjust air-fuel strategy.

Search terms such as Nissan Z upstream oxygen sensor, INFINITI Q50 upstream right oxygen sensor, and INFINITI Q60 heated O2 sensor all point to this type of direct-fit emission control component. If the original sensor has triggered a fault code, caused rough running, increased fuel use, or illuminated the malfunction indicator light, part number 250-54117 is the correct replacement to verify against the listed position and connector details.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Higher fuel consumption from a failing upstream sensor
• Increased exhaust emissions
• Poor engine operation caused by degraded sensor signal

Installation Notes and Tips

Confirm the exact vehicle, model year, and sensor position before installation. For the listed INFINITI Q50, INFINITI Q60, and Nissan Z applications, verify upstream right or upstream left placement as shown in the fitment data. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before replacement, since physical damage can shorten sensor life and affect signal quality.

Part number 250-54117 uses a 4-wire heated design with a male connector and 18.00 mm thread diameter, so matching the original connector style and thread size is important for proper installation.

Quality Assurance

Walker Products has supplied engine management and oxygen/air-fuel sensors since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. Walker Products OE parts are built for application-specific fitment and ECU feedback requirements on the listed vehicles.