Walker 250-241295 Oxygen Sensor - Downstream Left

Walker OE Base Oxygen Sensor

Walker 250-241295 is a specific-fit heated narrow-band oxygen sensor built for downstream left placement on select Toyota and Lexus applications. It is engineered to provide the ECU with the exhaust feedback needed for fuel control and emissions monitoring on the listed vehicles.

• Heated narrow-band oxygen sensor for downstream left location
• Specific-fit design for direct application matching
• 4-wire configuration with square female connector
• Male spade terminals for vehicle-specific connection
• M18 x 1.5 thread size with 22 mm wrench size
• OE Base Sensor line for application-focused replacement coverage

Product Details

The Walker OE Base Sensor line focuses on original-equipment-style replacement coverage for defined vehicle applications. Part number 250-241295 is made for the downstream left position and is listed for 2020-2024 Toyota 4Runner, 2020-2021 Lexus LX570, and 2022-2023 Lexus GX460 applications. If you are searching for a downstream left oxygen sensor for a Toyota 4Runner or Lexus GX460, Walker 250-241295 provides the correct fitment profile for those vehicles.

As a heated narrow-band oxygen sensor, this unit supports exhaust monitoring after the catalytic converter and helps the ECU evaluate system performance. Walker Products states that its engine management sensors are developed as OE replacement parts for specific vehicle applications, with fitment matched to the vehicle position and diagnostic feedback requirements.

What It Helps Address

• Check engine light related to downstream oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Elevated exhaust emissions from a failing sensor
• Rough engine operation tied to sensor signal issues
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes

Confirm the downstream left location before ordering, since this part is application-specific. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear before installation, as damaged wiring can shorten sensor life and affect operation. Verify thread size, connector shape, and terminal layout against the original sensor on the vehicle.

Fits 2021-2024 Toyota 4Runner, downstream left. Fits 2023 Lexus GX460, downstream left. Fits 2022 Lexus GX460, downstream left, from 08/2021. Fits 2021 Lexus LX570, downstream left. Fits 2020 Lexus LX570, downstream left, from 08/2019. Fits 2020 Toyota 4Runner, downstream left, from 08/2019.

Quality Assurance

Walker Products manufactures engine management and oxygen/air-fuel sensors under ISO 9001 and TS 16949 quality systems. The OE Base Sensor line is built around defined applications to support accurate fitment and diagnostic feedback for the listed Toyota and Lexus vehicles. This part cross-references no additional part numbers in the provided data.