Walker 250-54006 Oxygen Sensor

Walker Products OE Oxygen Sensor 250-54006

Walker Products OE 250-54006 is a heated, specific-fit oxygen sensor built for direct replacement in select Toyota, Lexus, Scion, and Pontiac applications. It is engineered to provide the ECU with the correct exhaust feedback for upstream monitoring, helping maintain proper fuel control and emissions performance.

Key Features

• Heated oxygen sensor for faster operating temperature
• Specific-fit design for the listed vehicle applications
• 4-wire configuration with male connector
• Threaded mounting type with 18.0 mm thread diameter
• 13.31 in. wiring harness length and 16.85 in. overall length
• Radiused polygon connector shape for application-specific fitment

Product Details

Walker Products OE focuses on original-equipment-style replacement sensors for modern engine management systems. Part number 250-54006 is built for upstream positions and is listed for multiple Toyota Tacoma, Toyota Prius, Toyota Corolla, Toyota Yaris, Toyota Matrix, Toyota Highlander, Toyota Tundra, Toyota Sequoia, Lexus LS460, Lexus IS F, Lexus ES350, Scion iM, Scion xD, Pontiac Vibe, and Toyota C-HR applications. For buyers searching for a Toyota Tacoma upstream oxygen sensor or a Lexus LS460 upstream left oxygen sensor, this part number provides a direct-fit option matched to the vehicle position and ECU feedback requirements.

Walker Products has supplied engine management and oxygen/air-fuel sensors since 1946 and manufactures OE replacement parts under ISO 9001/TS 16949 quality systems. The Walker Products OE line is focused on application-specific fitment, so the sensor, connector, and harness layout are matched to the listed vehicle positions rather than using a universal design. This part number, 250-54006, is intended for upstream sensor locations including upstream right, upstream left, upstream, and upstream front positions where listed.

Common Issues This Sensor May Address

• Check engine light related to an upstream oxygen sensor fault
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation from incorrect air-fuel correction
• Higher exhaust emissions from a failing sensor signal
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

Verify the exact year, make, model, and sensor position before ordering. Confirm the connector shape, wire count, thread diameter, and harness length against the original part. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, since physical damage can shorten service life and affect signal quality. For fitment examples, this part fits 2022-2023 Toyota Tacoma, upstream right; 2022 Lexus ES350, upstream left; 2018-2021 Toyota C-HR, upstream; and 2004-2011 Toyota Prius, upstream.

Quality Assurance

Walker Products OE sensors are manufactured as OE-style replacements for specific vehicle applications and built to deliver the diagnostic feedback expected by the ECU. The brand’s long-running focus on engine management components and certified manufacturing processes supports consistent fitment and signal performance across the listed applications.