Walker 250-241124 Oxygen Sensor - Downstream Rear or Upstream

Walker Products OE Oxygen Sensor for Hyundai and Kia

Walker Products OE Part Number 250-241124 is a heated oxygen sensor built for specific upstream and downstream rear applications on select Hyundai and Kia vehicles. It is engineered as an OE-style replacement to deliver the diagnostic feedback the ECU expects, helping maintain proper fuel control and emissions performance.

For drivers searching for a 2001-2006 Kia Optima upstream oxygen sensor or a 2002-2005 Hyundai Sonata upstream oxygen sensor, this Walker Products OE sensor provides application-specific fitment and connector design. It also covers select Hyundai Santa Fe and Hyundai XG300 positions listed below.

Key Features

• Heated oxygen sensor design for faster operating temperature
• Specific fit application for the listed Hyundai and Kia vehicles
• 4-wire configuration with 20-gauge wiring
• Threaded mounting type with 18.0 mm thread diameter
• Radiused polygon male connector for proper vehicle-side connection
• Wiring harness length: 13.31 in.; overall length: 16.85 in.
• Walker Products OE Part Number 250-241124

Product Details

Walker Products OE focuses on engine management and oxygen/air-fuel sensors engineered as original-equipment replacement parts for specific vehicle applications. This sensor is manufactured for the correct fitment position and is intended to provide the ECU with the feedback needed for closed-loop fuel control and emissions monitoring. If the original sensor has failed, the vehicle may store fault codes, run poorly, increase fuel consumption, or illuminate the malfunction indicator light.

This part cross-references no listed aftermarket part numbers in the provided data. Walker Products OE 250-241124 is a direct-fit oxygen sensor solution for select Hyundai Sonata, Hyundai Santa Fe, Hyundai XG300, and Kia Optima applications.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough engine operation caused by incorrect air-fuel feedback
• Increased fuel consumption from a failing upstream sensor
• Elevated exhaust emissions from inaccurate ECU input
• Fault codes tied to Bank 1 Sensor 1 or rear downstream sensor positions

Installation Notes

Verify the sensor position before installation. This part is listed for upstream and downstream rear locations depending on the vehicle, including Fits 2001-2006 Kia Optima, Upstream; Fits 2002-2005 Hyundai Sonata, Upstream; Fits 2002-2004 Hyundai Santa Fe, Upstream; Fits 2001 Hyundai Santa Fe, Upstream; Fits 1999-2001 Hyundai Sonata, Upstream; and Fits 2001 Hyundai XG300, Downstream Rear. Check the sensor, wiring harness, and connector for physical damage before replacement, and confirm the vehicle build date where noted for the 2001 Hyundai Santa Fe application.

Quality Assurance

Walker Products states that its engine management sensors are developed under Automotive ISO 9001/TS 16949 quality systems and built for specific OE replacement applications. Since 1946, the brand has supplied engine management and fuel system components for vehicle service needs.