Walker 350-33037 Oxygen Sensor - Downstream, Downstream Front or Upstream

Walker Oxygen Sensor for Nissan and Infiniti

Walker Products 350-33037 is a heated oxygen sensor built as a specific-fit OE replacement for select Nissan and Infiniti applications. It is engineered to provide the ECU with the feedback needed for accurate fuel control and emissions monitoring.

For drivers searching for a downstream oxygen sensor for a 1995-1997 Nissan 200SX, 1993-1996 Nissan Altima, or 1995-1996 Nissan Maxima, this part number is matched to the listed vehicle positions and connector style.

Key Features

• Heated oxygen sensor for emissions and fuel-trim feedback
• Specific-fit design for listed Nissan and Infiniti applications
• 3-wire configuration with female connector
• Threaded mounting with 12.0 mm thread diameter
• Wiring harness length: 16.46
• Overall length: 20.0
• Radiused polygon connector shape

Walker Products Aftermarket Line

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors built for application-specific replacement. Part number 350-33037 follows that approach with fitment matched to the sensor location, connector style, and ECU feedback requirements used on the listed vehicles.

Detailed Description

Walker Products 350-33037 is designed for downstream and downstream front positions across select 1993-1997 Nissan and Infiniti models, including Nissan 200SX, Altima, Sentra, Maxima, and Infiniti I30. It is a heated sensor with a threaded mount, female connector, and 3-wire layout, making it a direct replacement choice when the original sensor has failed or the vehicle is storing oxygen-sensor-related fault codes. This part number is also referenced by shoppers looking for a Nissan Altima downstream oxygen sensor or a Nissan Sentra B1S2 replacement.

This part cross-references Bosch 15717 for the same application.

What It Helps Address

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

Installation Notes and Tips

Verify the sensor position before ordering, since this application includes downstream, downstream front, and upstream listings. Inspect the wiring harness and connector for heat damage, corrosion, or broken terminals before installation. Confirm thread diameter, connector shape, and wire count against the original sensor to ensure proper replacement on the vehicle.

Quality Assurance

Walker Products has produced engine management components since 1946 and operates as an ISO 9001/TS 16949 certified company. The 350-33037 is manufactured for the specified application and position so the ECU receives the expected diagnostic feedback.