Walker 250-241271 Oxygen Sensor - Downstream

OE Base Oxygen Sensor for Hyundai Elantra

Walker OE Base Sensor 250-241271 is a specific-fit, heated narrow-band oxygen sensor for downstream use on select 2021-2026 Hyundai Elantra models. It is built to provide the ECU with the exhaust feedback needed for proper fuel control and emissions monitoring.

Key Features

• Specific-fit downstream oxygen sensor for 2021-2026 Hyundai Elantra
• Heated narrow-band design for faster operating response
• 4-wire configuration with square female connector and male spade terminals
• M18 x 1.5 thread size with 22 mm wrench size
• Walker OE Base Sensor line for application-matched replacement fitment

Product Details

Walker Products 250-241271 is engineered as an OE-style replacement oxygen sensor for the downstream position on the Hyundai Elantra. The sensor is matched to the application and position so the engine control unit receives the correct diagnostic feedback for emissions and fuel-management operation. Walker Products has supplied engine management and oxygen/air-fuel sensors since 1946, and this OE Base Sensor line focuses on direct replacement fitment for specific vehicles.

This part number, 250-241271, is listed for 2021-2026 Hyundai Elantra, downstream. It is a practical replacement when the original sensor is no longer reporting exhaust oxygen content accurately or when the connector, wiring, or sensor element has been affected by heat and age.

What It Helps Address

• Check engine light related to downstream oxygen sensor performance
• Rough running caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate sensor data
• Elevated exhaust emissions from poor air-fuel correction
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

Confirm the connector shape, wire count, thread size, and downstream location before installation. Inspect the sensor harness and connector for heat damage, corrosion, or broken terminals, since those issues can shorten sensor life or trigger repeat fault codes. For best results, verify the vehicle application against the part number 250-241271 and the downstream mounting position on the Hyundai Elantra.

Quality Assurance

Walker Products manufactures engine management sensors to OE replacement standards and operates as an ISO 9001/TS 16949 certified company. The OE Base Sensor line is built around application-specific fitment and diagnostic feedback requirements for modern vehicle control systems.