Walker 250-24220 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Walker Products OE Oxygen Sensor for Lexus

Walker Products OE Part Number 250-24220 is a heated oxygen sensor built for specific vehicle applications and ECU feedback requirements. It is engineered as an OE-style replacement for select Lexus models, including the 1990-1994 Lexus LS400 and 1992-1995 Lexus SC400 in upstream positions.

Key Features

• Heated oxygen sensor design for faster operating temperature
• Specific fit application for direct vehicle placement
• 4-wire configuration with 20-gauge wiring
• Radiused polygon male connector for proper harness connection
• Threaded mounting with 18.0 mm thread diameter
• Overall length: 10.55 in.; wiring harness length: 7.01 in.
• Walker Products OE line for engine management and emissions control service

Product Details

Walker Products OE 250-24220 is designed for upstream oxygen sensor service on Lexus LS400 and Lexus SC400 applications. It provides the diagnostic feedback the ECU uses to manage air-fuel control and emissions performance. This part number is built for the specified position and fitment, making it a direct replacement choice for 1990-1994 Lexus LS400 upstream and 1992-1995 Lexus SC400 upstream right or upstream left locations. Walker Products OE focuses on application-specific sensor design for engine management systems, and this sensor follows that approach with the correct connector style, wire count, and threaded mount.

This part cross-references no listed aftermarket part numbers in the provided data.

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 upstream sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Verify the sensor position before installation: this part is listed for upstream use on the Lexus LS400 and upstream left or upstream right use on the Lexus SC400. Inspect the sensor wiring harness and connector for damage before replacement, since physical wear can shorten sensor life and affect signal quality. Confirm thread size, connector shape, and wire routing match the original unit before final installation.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and manufactures OE-style replacement sensors for specific applications. The company is ISO 9001 and TS 16949 certified, supporting consistent production and application-specific fitment for emissions control service.