Walker 350-64118 Oxygen Sensor - Upstream Left or Upstream Right

Walker 350-64118 Oxygen Sensor for Nissan Z and INFINITI

Walker Products 350-64118 is a heated oxygen sensor built as a specific-fit OE replacement for select Nissan and INFINITI applications. It is engineered for upstream right and upstream left positions where listed, helping the ECU receive the exhaust feedback it expects for proper fuel control and emissions monitoring.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for exact application fitment. The 350-64118 follows that approach with a 4-wire, male-connector design, 18.00 mm thread diameter, 9.37 in. wiring harness length, and 12.91 in. overall length for the listed vehicles.

Key Features

• Part number: 350-64118
• Heated oxygen sensor for upstream exhaust monitoring
• Specific fit for listed Nissan Z and INFINITI Q50/Q60 applications
• 4-wire design with male connector
• 18.00 mm thread diameter
• Wiring harness length: 9.37 in.
• Overall length: 12.91 in.
• Walker Products Aftermarket engine management sensor line

Detailed Description

Walker 350-64118 is an OE-style oxygen sensor for vehicles that require precise upstream exhaust feedback. In 2023-2025 Nissan Z, 2022-2024 INFINITI Q50, 2022 INFINITI Q60, and select 2016-2021 INFINITI Q50 and 2017-2021 INFINITI Q60 applications, this sensor is listed for upstream right and upstream left positions as specified. If you are replacing a failed upstream oxygen sensor on a Nissan Z or INFINITI Q50/Q60, this part number provides the correct fitment details for the listed engine management setup.

Walker Products has supplied engine management and oxygen/air-fuel sensors since 1946 and manufactures parts to match the specific application and sensor location required by the vehicle ECU. Part number 350-64118 is built for direct replacement use where the original sensor has triggered fault codes, poor fuel control, elevated emissions, or a malfunction indicator light.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Rough engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel correction
• Elevated exhaust emissions from a failing sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

Confirm the exact position before ordering: this listing covers upstream right and upstream left applications only where shown in the fitment data. Inspect the sensor wiring harness and connector for heat damage, corrosion, or broken terminals before installation, since damaged wiring can shorten sensor life and affect ECU readings. For best results, verify thread size, connector style, and harness length against the original sensor before replacement.

• Fits 2023-2025 Nissan Z, upstream right.
• Fits 2022-2024 INFINITI Q50, upstream right.
• Fits 2022 INFINITI Q60, upstream right.
• Fits 2016-2021 INFINITI Q50, upstream right.
• Fits 2016-2021 INFINITI Q50, upstream left.
• Fits 2017-2021 INFINITI Q60, upstream right.
• Fits 2017-2021 INFINITI Q60, upstream left.

Quality Assurance

Walker Products is an Automotive ISO9001/TS 16949 certified manufacturer with a long history in engine management and emissions-related sensors. The 350-64118 is produced as a specific application replacement to support the diagnostic feedback expected by the ECU in the listed Nissan and INFINITI vehicles.