Walker 250-54038 Oxygen Sensor - Upstream

OE Upstream Oxygen Sensor for Honda and Acura

Walker Products OE oxygen sensor Part Number 250-54038 is a heated, specific-fit replacement built for upstream applications. It is engineered to deliver the ECU feedback needed for accurate air-fuel control on select Honda and Acura models, including Acura ILX, Acura TLX, Honda CR-V, Honda Accord, and Honda Civic.

Walker Products OE focuses on application-specific engine management sensors, and this oxygen sensor follows that approach with the correct connector style, thread size, and harness length for the listed vehicles. If your vehicle has a fault code tied to the upstream sensor, this part number 250-54038 is a direct replacement option for the affected position.

Key Features

• Heated oxygen sensor for upstream placement
• Specific-fit design for the listed Honda and Acura applications
• 4-wire configuration with 20-gauge wiring
• Radiused polygon male connector for OE-style connection
• 18.0 mm thread diameter with threaded mounting
• Overall length: 14.88 in.; wiring harness length: 11.34 in.
• Walker Products OE part number 250-54038

Detailed Description

Walker Products OE 250-54038 is an upstream oxygen sensor designed for vehicles that rely on precise exhaust feedback to manage fuel delivery and emissions. It is built as a specific replacement for the original sensor location, helping maintain the diagnostic response expected by the ECU. This matters on modern vehicles where a failing sensor can trigger fault codes, rough running, higher fuel use, increased emissions, or an illuminated malfunction indicator light.

Compatible With 2022 Acura ILX, upstream; 2013-2021 Acura ILX, upstream; 2015-2020 Acura TLX, upstream; 2015-2020 Honda Fit, upstream; 2012-2019 Honda CR-V, upstream; 2013-2017 Honda Accord, upstream; 2012-2015 Honda Civic, upstream; 2012-2015 Honda Crosstour, upstream; 2011-2014 Honda CR-Z, upstream; and 2014 Honda Insight, upstream. This part number 250-54038 is also a fitment-based search match for drivers looking for an upstream oxygen sensor for Honda Civic, Honda CR-V, or Acura TLX applications.

What It Helps Address

• Check engine light related to the upstream oxygen sensor
• Rough engine operation caused by incorrect air-fuel feedback
• Higher fuel consumption from inaccurate sensor readings
• Elevated exhaust emissions
• Stored ECU fault codes tied to the sensor circuit or related systems

Installation Notes and Tips

Before replacement, inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten sensor life and affect operation. Confirm the vehicle uses the upstream position and verify connector shape, thread diameter, and harness length against the original part before installation. For best results, clear diagnostic trouble codes after repair and confirm the ECU completes its readiness checks.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and manufactures OE-style replacement sensors for specific applications. The Walker Products OE line is built around application-matched fitment and ECU feedback requirements for the listed vehicles.