Walker 350-34901 Oxygen Sensor

OE-Style Downstream Oxygen Sensor

Walker Products 350-34901 is a heated, specific-fit oxygen sensor engineered as an OE replacement for select Nissan and INFINITI applications. It is built for downstream placement and provides the ECU with the feedback needed to monitor exhaust system performance and fuel control.

For drivers searching for a downstream oxygen sensor for Nissan Maxima, Murano, Pathfinder, Rogue, Sentra, Altima, Juke, Quest, NV350 Urvan, X-Trail, or INFINITI QX60, this Walker Products Aftermarket part number 350-34901 is matched to the listed vehicle positions and connector requirements.

Key Features

• Heated oxygen sensor for downstream exhaust monitoring
• Specific-fit design for listed Nissan and INFINITI applications
• 4-wire configuration with 20-gauge wiring
• 13.31 in. wiring harness length and 16.85 in. overall length
• 18.0 mm thread diameter with threaded mounting
• Male connector with radiused polygon connector shape
• OE replacement design for ECU feedback and emissions system monitoring

Product Details

Walker Products Aftermarket is part of a long-running engine management and emissions sensor line focused on OE-style replacement coverage. The 350-34901 oxygen sensor is manufactured for the specific application and position listed in the fitment data, helping maintain the correct downstream signal for the vehicle’s diagnostic system. This part number 350-34901 is used in downstream positions across multiple Nissan and INFINITI models, including rear, front, left, and right locations where specified.

Compatible vehicle coverage includes 2015-2023 Nissan Maxima, Murano, Pathfinder, Rogue, Sentra, Altima, Juke, Quest, NV350 Urvan, and X-Trail, plus 2015-2020 INFINITI QX60 applications. For shoppers comparing a downstream oxygen sensor for Nissan Maxima or an OE replacement oxygen sensor for INFINITI QX60, Walker Products 350-34901 is built to match the listed fitment and connector style.

What It Helps Address

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

Installation Notes and Tips

• Verify the exact year, model, and sensor position before ordering.
• Install only in the listed downstream location, including rear, front, left, or right positions where specified.
• Inspect the sensor wiring harness and connector for damage before installation.
• Check for exhaust leaks or related system faults that can affect sensor readings.
• Confirm the connector shape and thread size match the original sensor.

Quality Assurance

Walker Products manufactures engine management sensors as OE-style replacements for specific applications and positions. The brand states its products are developed for diagnostic system feedback required by the ECU and produced under Automotive ISO9001/TS 16949 certified processes.