Walker 250-54136 Oxygen Sensor - Downstream Right

Walker OE Base Oxygen Sensor for Lexus LS500

Walker OE Base Sensor 250-54136 is a heated wide-band oxygen sensor built for precise exhaust feedback in the 2023-2025 Lexus LS500, downstream right position. It is engineered as an OE-style replacement for the specific application, helping the ECU monitor air-fuel control and emissions performance.

Key Features

• Heated wide-band oxygen sensor for accurate exhaust signal response
• 4-wire, 4-terminal design for the specified vehicle application
• M18 x 1.5 thread size for direct-fit installation in the correct mounting location
• Built for the downstream right position on the Lexus LS500
• Walker OE Base Sensor line focuses on application-specific replacement coverage

Application Details

Compatible with 2023-2025 Lexus LS500, downstream right. Part number 250-54136 is matched to the vehicle’s sensor location and diagnostic requirements, making it a direct replacement choice for the Lexus LS500 when the original downstream right oxygen sensor needs service. Walker 250-54136 is also identified as an OE Base Sensor, a product line centered on fitment-specific engine management and oxygen sensor coverage.

What It Helps Address

• Check engine or malfunction indicator light related to oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel data
• Higher exhaust emissions from a failing downstream sensor
• Fault codes stored in the ECU tied to the affected sensor circuit

Installation Notes and Tips

Verify the downstream right location before replacement and inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear. Confirm the M18 x 1.5 thread size and 4-wire, 4-terminal configuration match the original part. Because oxygen sensor faults can also involve related wiring or connector issues, check the full circuit during diagnosis. This part number is 250-54136.

Quality Assurance

Walker Products develops engine management and oxygen/air-fuel sensors as OE replacement parts for global vehicle applications. The company is ISO 9001/TS 16949 certified and has supplied engine management components since 1946. Walker 250-54136 is part of the OE Base Sensor line, built around application-specific fitment and ECU feedback requirements for the Lexus LS500.