Walker 350-33035 Oxygen Sensor - Downstream or Upstream

Walker 350-33035 Oxygen Sensor Overview

Walker Products 350-33035 is a heated oxygen sensor built as a specific-fit replacement for select Nissan applications. It is engineered for the correct mounting position and ECU feedback expected by the vehicle, helping maintain accurate exhaust monitoring on the supported models.

Compatible With 1996 Nissan 240SX downstream, 1987-1988 Nissan Sentra upstream, and 1987 Nissan Pulsar NX upstream. This Walker Products Aftermarket oxygen sensor is a direct-fit service part for vehicles that need precise sensor response at the specified location.

Key Features

• Part number: 350-33035
• Heated oxygen sensor design for faster operating temperature
• Specific fit application for the listed Nissan models and positions
• Threaded mounting type with 12.0 mm thread diameter
• 3-wire configuration with 20-gauge wiring
• Radiused polygon male connector for vehicle-specific connection
• Wiring harness length: 9.17
• Overall length: 12.72

Product Details

Walker Products Engine Management and Oxygen/Air-Fuel sensors are developed as OE-style replacement parts for a wide range of vehicles. The 350-33035 is built for the exact application and sensor location required by the ECU, which is important on newer vehicles that monitor sensor performance and store fault codes when readings fall outside expected range. Walker Products Aftermarket focuses on engine management and fuel system components, and this oxygen sensor reflects that application-specific approach.

Fits 1996 Nissan 240SX, downstream. Fits 1987-1988 Nissan Sentra, upstream. Fits 1987 Nissan Pulsar NX, upstream. Part number 350-33035 is also referenced by buyers searching for a direct replacement oxygen sensor for these Nissan fitments.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel monitoring
• Elevated exhaust emissions from a failing sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes

Confirm the sensor position before installation: downstream on the 1996 Nissan 240SX, and upstream on the 1987-1988 Nissan Sentra and 1987 Nissan Pulsar NX. Inspect the sensor wiring harness and connector for damage before replacement, since physical wear can shorten service life and affect signal quality. Verify thread size, connector shape, and harness routing against the original part before final tightening.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates as an Automotive ISO9001/TS 16949 certified company. The 350-33035 is produced to match the specified application and diagnostic feedback requirements for the supported vehicles.