Walker 350-34654 Oxygen Sensor - Downstream, Downstream Rear or Downstream Right

Walker OE Replacement Oxygen Sensor

Walker OE Replacement part number 350-34654 is a heated narrow-band oxygen sensor built for specific downstream applications. It is engineered to provide the ECU with the feedback needed for fuel control and emissions monitoring on select Nissan and INFINITI vehicles.

For drivers searching for a downstream oxygen sensor for Nissan Altima, Sentra, Versa, Kicks, TITAN, or INFINITI QX50/QX55 applications, this Walker sensor is built to match the original fitment position and connector style. The 350-34654 is designed for direct replacement service where the factory sensor has failed or is reporting inaccurate data.

Key Features

• Heated narrow-band oxygen sensor for downstream use
• Specific-fit design for the listed vehicle applications
• 4-wire configuration with blade terminals
• Rectangular male connector for OE-style connection
• M18 x 1.5 threaded mounting design
• 400 mm wiring harness length and 425 mm overall length
• 22 mm wrench size for service access

Product Details

Walker Products OE Replacement sensors are developed as direct-fit replacements for original equipment applications. Part number 350-34654 is configured for downstream positions, including downstream right and downstream rear locations where listed, and is intended to restore proper sensor feedback to the engine control unit. This matters on vehicles such as the Nissan Altima, Sentra, Versa, Kicks, TITAN, and INFINITI QX50/QX55, where the ECU relies on accurate oxygen sensor input to manage emissions-related diagnostics.

Walker Products has supplied engine management and fuel system components since 1946 and manufactures electronic sensors to application-specific standards. The 350-34654 follows that OE replacement approach with the correct connector, terminal count, wire count, and threaded mounting style for the listed vehicles.

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

What It Helps Address

• Check engine light or malfunction indicator light related to oxygen sensor performance
• Incorrect downstream sensor feedback to the ECU
• Rough running caused by inaccurate emissions-system data
• Increased fuel consumption from faulty sensor readings
• Elevated exhaust emissions from a worn or failed sensor

Installation Notes and Tips

Verify the sensor position before installation, since this part is listed for downstream, downstream right, and downstream rear locations depending on the vehicle. Inspect the sensor wiring harness and connector for heat damage, corrosion, or broken terminals before replacement. Confirm thread size, connector shape, and wire routing against the original part to ensure proper fit on the vehicle.

Compatible With: Fits 2023-2025 INFINITI QX50, downstream; Fits 2023-2025 INFINITI QX55, downstream; Fits 2019-2025 Nissan Altima, downstream; Fits 2025 Nissan Kicks Play, downstream; Fits 2020-2025 Nissan Sentra, downstream; Fits 2022-2025 Nissan Versa, downstream; Fits 2022-2024 Nissan Kicks, downstream; Fits 2017 Nissan Kicks, downstream; Fits 2020-2024 Nissan TITAN, downstream right; Fits 2020-2024 Nissan TITAN XD, downstream right; Fits 2019-2022 INFINITI QX50, downstream; Fits 2022 INFINITI QX55, downstream; Fits 2018-2021 Nissan Kicks, downstream; Fits 2019-2021 Nissan Versa, downstream; Fits 2020 Nissan Pathfinder, downstream rear; Fits 2018-2019 Nissan Versa Note, downstream.

Quality Assurance

Walker Products manufactures this OE Replacement oxygen sensor under ISO 9001 and TS 16949 quality systems, with application-specific engineering for the listed Nissan and INFINITI fitments. Part number 350-34654 is built to deliver the diagnostic feedback expected by the vehicle ECU for the covered applications.