Walker 350-34431 Oxygen Sensor - Downstream Left or Downstream Right

Walker 350-34431 Oxygen Sensor for Lexus SC400

Walker Products 350-34431 is a heated oxygen sensor built as a specific-fit OE-style replacement for select Lexus SC400 applications. It is engineered to provide the ECU with the feedback needed for proper fuel control and emissions monitoring, making it a direct choice for downstream left or downstream right service on 1992-1995 Lexus SC400 models.

Key Features

• Heated oxygen sensor for faster operating temperature and signal response
• Specific-fit design for the listed Lexus SC400 applications
• Threaded mounting type with 18.0 mm thread diameter
• 4-wire configuration with 20-gauge wiring
• Radiused polygon male connector for application-specific connection
• Wiring harness length: 29.45 in.; overall length: 32.99 in.

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors engineered as replacement parts for a wide range of vehicles. Part number 350-34431 is built for the correct fitment position and diagnostic feedback expected by the vehicle’s ECU. For Lexus SC400 owners, this oxygen sensor is listed for downstream left and downstream right positions on 1992-1995 models, including searches such as Lexus SC400 downstream oxygen sensor replacement and Walker 350-34431 oxygen sensor for Lexus SC400.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) 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 incorrect air-fuel correction
• Higher exhaust emissions from a failing downstream sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle position before installation: this part is listed for downstream left and downstream right locations on the Lexus SC400. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before replacement, since physical damage can shorten sensor life and affect signal quality. Verify thread size and connector style against the original sensor before installation.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates as an ISO 9001 / TS 16949 certified company. The 350-34431 is produced as a specific application replacement to match the required fitment and ECU feedback for the listed vehicles.

• Fits 1992-1995 Lexus SC400, downstream right
• Fits 1992-1995 Lexus SC400, downstream left