Walker 350-34115 Oxygen Sensor - Downstream Left or Downstream Right

Walker 350-34115 Oxygen Sensor for Nissan Sentra

Walker Products 350-34115 is a heated oxygen sensor built as a specific-fit OE-style replacement for select Nissan Sentra applications. It is engineered to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions monitoring.

Key Features

• Heated oxygen sensor for faster operating response
• Specific fitment for the listed Nissan Sentra positions
• 4-wire design with male connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 28.27 in.; overall length: 31.81 in.
• Walker Products Aftermarket line for engine management and oxygen/air-fuel sensor replacement

Product Details

The Walker Products Aftermarket line focuses on engine management sensors built for direct replacement applications. Part number 350-34115 is made for the correct fitment position and connector style, which is important for accurate ECU feedback on emissions-related systems. This oxygen sensor is listed for 2001 Nissan Sentra downstream left and 2002 Nissan Sentra downstream right applications, including the noted emissions-package exclusions. If you are replacing a failing Nissan Sentra oxygen sensor, 350-34115 provides the application-specific configuration needed for the listed vehicles.

Common Issues This Sensor May Address

• Check engine light or MIL related to oxygen sensor performance
• Poor fuel economy caused by incorrect exhaust feedback
• Rough engine operation from inaccurate air-fuel monitoring
• Higher exhaust emissions from a degraded downstream sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Verify the vehicle’s year, emissions package, and sensor position before ordering. For these Nissan Sentra applications, confirm whether the vehicle uses downstream left or downstream right placement, and check the connector, harness routing, and threaded bung condition before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten sensor life and affect readings.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates as an Automotive ISO 9001/TS 16949 certified company. The 350-34115 is manufactured as a specific application replacement to support the ECU feedback required by the vehicle’s emissions system.