Walker 250-54115 Oxygen Sensor - Upstream

OE Upstream Oxygen Sensor for Lexus

Walker Products OE 250-54115 is a heated, specific-fit upstream oxygen sensor engineered as an OE replacement for select Lexus applications. It is built for the correct mounting position, connector style, and ECU feedback expected on vehicles such as the Lexus IS300, RC300, GS300, GS200t, IS200t, and RC200t.

For drivers diagnosing a check engine light, poor fuel economy, or elevated emissions, this oxygen sensor is designed to restore accurate exhaust feedback to the engine management system. Walker Products OE focuses on application-specific fitment, making 250-54115 a direct replacement choice for the listed Lexus upstream sensor locations.

Key Features

• Heated oxygen sensor for upstream exhaust monitoring
• Specific-fit design for the correct Lexus application
• 4-wire configuration with male connector
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon connector shape for OE-style connection
• Wiring harness length: 14.76 in.; overall length: 17.71 in.
• Walker Products OE part number 250-54115

Fitment Details

• Fits 2022-2025 Lexus IS300, Upstream, OE Base Sensor
• Fits 2022-2025 Lexus RC300, Upstream, OE Base Sensor
• Fits 2018-2021 Lexus IS300, Upstream, Bank 1 Sensor 1 needs an upstream oxygen sensor; Walker Products OE
• Fits 2018-2021 Lexus IS300, Upstream, Front oxygen sensor compatible with various vehicle models; Walker Products OE
• Fits 2018-2021 Lexus RC300, Upstream, Bank 1 Sensor 1 needs an upstream oxygen sensor; Walker Products OE
• Fits 2018-2021 Lexus RC300, Upstream, Front oxygen sensor compatible with various vehicle models; Walker Products OE
• Fits 2018-2019 Lexus GS300, Upstream, Bank 1 Sensor 1 needs an upstream oxygen sensor; Walker Products OE
• Fits 2018-2019 Lexus GS300, Upstream, Front oxygen sensor compatible with various vehicle models; Walker Products OE
• Fits 2016-2017 Lexus GS200t, Upstream, Bank 1 Sensor 1 needs an upstream oxygen sensor; Walker Products OE
• Fits 2016-2017 Lexus GS200t, Upstream, Front oxygen sensor compatible with various vehicle models; Walker Products OE
• Fits 2016-2017 Lexus IS200t, Upstream, Bank 1 Sensor 1 needs an upstream oxygen sensor; Walker Products OE
• Fits 2016-2017 Lexus IS200t, Upstream, Front oxygen sensor compatible with various vehicle models; Walker Products OE
• Fits 2017 Lexus RC200t, Upstream, OE Base Sensor
• Fits 2016 Lexus RC200t, Upstream, Bank 1 Sensor 1 needs an upstream oxygen sensor; Walker Products OE
• Fits 2016 Lexus RC200t, Upstream, Front oxygen sensor compatible with various vehicle models; Walker Products OE

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Rough engine operation caused by incorrect exhaust feedback
• Reduced fuel economy from inaccurate air-fuel monitoring
• Higher exhaust emissions from a failing sensor
• Stored ECU fault codes tied to Bank 1 Sensor 1 or front sensor locations

Installation Notes and Tips

Confirm the sensor position before ordering, since this part is for upstream applications only. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation, and verify the threaded mounting point is clean and undamaged. On Lexus IS300, RC300, GS300, GS200t, IS200t, and RC200t applications, matching the connector style and harness length is important for proper routing and ECU communication.

Quality Assurance

Walker Products OE sensors are developed as original-equipment replacement parts for specific vehicle applications. Walker Products has been producing engine management and fuel system components since 1946 and operates with ISO 9001/TS 16949 certification.