Walker 350-33039 Oxygen Sensor - Downstream Front

Walker 350-33039 Oxygen Sensor for Nissan Maxima

Walker Products 350-33039 is a heated oxygen sensor built as a specific-fit OE-style replacement for the exhaust monitoring system. It is designed for the 1996 Nissan Maxima downstream front position and helps the ECU receive the feedback it needs for fuel control and emissions management.

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors for vehicle-specific applications. The 350-33039 follows that approach with the correct threaded mounting, connector style, and harness layout for the listed fitment.

Key Features

• Specific-fit heated oxygen sensor for the downstream front location
• Fits 1996 Nissan Maxima, downstream front
• Walker Products part number 350-33039
• 3-wire design with 20-gauge wiring
• Radiused polygon female connector
• Threaded mounting with 12.0 mm thread diameter
• Overall length: 20.2
• Wiring harness length: 16.65

Detailed Description

This Walker oxygen sensor is engineered for direct replacement in the 1996 Nissan Maxima downstream front position. As a heated sensor, it reaches operating temperature faster than an unheated design, helping the engine management system maintain accurate exhaust feedback once the vehicle is running. The 350-33039 is built for specific fitment, so the connector, harness length, and threaded mount align with the listed application.

Walker Products Aftermarket develops engine management sensors as OE-style replacements for a wide range of vehicles. For this application, the 350-33039 supports the ECU with the diagnostic input needed to monitor exhaust conditions and maintain proper fuel control. This part cross-references Bosch (e.g., 15733) for the same application.

What It Helps Address

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

Installation Notes and Tips

Confirm the vehicle is a 1996 Nissan Maxima with the downstream front sensor location before ordering. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear before installation, since damaged wiring can shorten sensor life and affect readings. Verify thread size and connector shape against the original part to ensure proper fit.

Quality Assurance

Walker Products states that its engine management sensors are developed as OE replacement parts and the company operates under Automotive ISO9001/TS 16949 certification standards. The 350-33039 is backed by that manufacturing approach for the listed application.