Walker 350-33068 Oxygen Sensor - Upstream

Walker 350-33068 Oxygen Sensor for Toyota Supra

Walker Products 350-33068 is a heated oxygen sensor built as a specific-fit OE-style replacement for the upstream position on select Toyota applications. It is engineered to deliver the ECU feedback needed for accurate fuel control, emissions monitoring, and drivability on 1991-1992 Toyota Supra models.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for the upstream location
• 3-wire configuration with 20-gauge wiring
• Radiused polygon male connector for application-specific connection
• 18.0 mm thread diameter and flange mount design
• 17.24 in. wiring harness length and 20.79 in. overall length

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered for direct replacement use. Part number 350-33068 is built for the upstream oxygen sensor position on 1991-1992 Toyota Supra models, where it helps the engine control unit monitor exhaust oxygen content and adjust air-fuel strategy. For Toyota Supra owners searching for an upstream oxygen sensor replacement, Walker 350-33068 provides the fitment-specific design needed for proper sensor placement and diagnostic feedback.

This part cross-references Walker Products 350-33068 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough running or inconsistent engine response
• Higher exhaust emissions from a failing upstream sensor
• Stored ECU fault codes tied to the oxygen sensor circuit

Installation Notes

Verify the upstream mounting location before installation and compare the connector, thread diameter, and harness length to the original sensor. Inspect the wiring harness and connector for heat damage, corrosion, or physical wear before replacement. On 1991-1992 Toyota Supra applications, confirm the sensor position and routing so the replacement matches the factory layout.

Quality Assurance

Walker Products manufactures engine management sensors as OE replacement parts for specific vehicle applications and supports them with ISO 9001/TS 16949 manufacturing standards. Part number 350-33068 is built to provide the diagnostic feedback expected by the ECU on the listed Toyota Supra fitment.