Walker 250-54129 Oxygen Sensor - Upstream Rear or Upstream Right

OE Oxygen Sensor for Lexus Hybrid Applications

Walker Products OE oxygen sensor Part Number 250-54129 is an OE-style replacement built for specific Lexus hybrid applications. It is engineered for the correct fitment position and to provide the ECU with the feedback needed for proper engine management.

Key Features

• OE replacement oxygen sensor from Walker Products OE
• Application-specific design for upstream right and upstream rear positions
• Supports ECU diagnostic feedback on Lexus LC500h and LS500h models
• Built for direct-fit service on listed vehicle applications
• Walker Products Part Number 250-54129

Fitment Details

• Fits 2022-2025 Lexus LC500h, upstream right.
• Fits 2025 Lexus LS500h, upstream right.
• Fits 2022-2023 Lexus LS500h, upstream right.
• Fits 2024 Lexus LS500h, upstream rear.
• Fits 2018-2021 Lexus LC500h, upstream right.
• Fits 2018-2021 Lexus LS500h, upstream right.

What This Sensor Helps Address

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

Installation Notes

Confirm the sensor location before ordering, since this part is listed for upstream right and upstream rear positions only. Inspect the sensor, wiring harness, and connector for physical damage during diagnosis, and verify the vehicle’s fault codes before replacement. For Lexus LC500h and LS500h applications, use the listed fitment details to match the correct side and position.

Quality Assurance

Walker Products OE sensors are developed as original-equipment replacement parts for global vehicle applications. The brand has produced engine management and fuel system components since 1946 and operates under ISO 9001/TS 16949 quality systems. Part Number 250-54129 reflects Walker Products’ application-specific approach for Lexus LC500h and LS500h oxygen sensor service.