Walker 250-241321 Oxygen Sensor - Downstream

Walker OE Base Oxygen Sensor Overview

Walker OE Base Sensor 250-241321 is a heated narrow-band oxygen sensor built as a specific-fit replacement for downstream emission control applications. It provides ECU feedback for the affected system and is listed for Hyundai Santa Cruz, Hyundai Tucson, Kia Sorento, Kia Sportage, and Hyundai Santa Fe applications.

The OE Base Sensor line focuses on application-specific fitment and sensor position, helping maintain the correct signal response for the vehicle’s engine management system. Part number 250-241321 is a direct-fit downstream oxygen sensor for select Hyundai and Kia models.

Key Features

• Heated narrow-band oxygen sensor for downstream placement
• Specific-fit design for the listed vehicle applications
• 4-wire configuration
• M18 x 1.5 thread size with 22 mm wrench size
• Engineered to provide diagnostic feedback required by the ECU
• Walker OE Base Sensor line for application-matched replacement coverage

Detailed Product Description

Walker Products has developed this oxygen sensor as an OE-style replacement for select Hyundai and Kia vehicles. The 250-241321 sensor is designed for downstream use, where it monitors exhaust system performance and supports the vehicle’s emissions diagnostics. For shoppers searching for a downstream oxygen sensor for a 2022-2026 Hyundai Santa Cruz, 2022-2026 Hyundai Tucson, 2022-2024 Kia Sorento, 2023-2024 Kia Sportage, or 2021-2023 Hyundai Santa Fe, this part number matches the listed application and position.

The OE Base Sensor product line is built around specific application coverage rather than universal fitment, which helps ensure the correct connector, thread, and signal characteristics for the vehicle. If the original sensor has failed, the engine may run poorly, fuel consumption can increase, exhaust emissions can rise, and the malfunction indicator light may illuminate. Part number 250-241321 is intended for those exact downstream applications.

What This Sensor Helps Address

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

Installation Notes and Tips

Confirm the sensor position before installation; this part is listed for downstream use only. Inspect the sensor wiring harness and connector for physical damage, since damaged wiring can shorten service life and affect signal quality. Verify thread size, wrench size, and connector routing against the original part before installation.

Fits 2022-2026 Hyundai Santa Cruz, downstream. Fits 2022-2026 Hyundai Tucson, downstream. Fits 2022-2024 Kia Sorento, downstream. Fits 2023-2024 Kia Sportage, downstream. Fits 2021-2023 Hyundai Santa Fe, downstream. Fits 2021 Kia Sorento, downstream from 01/2021.

Quality Assurance

Walker Products manufactures engine management and oxygen/air-fuel sensors for specific vehicle applications and has operated in the automotive aftermarket since 1946. The company is ISO 9001/TS 16949 certified and develops parts to support OE-style replacement needs for modern emissions systems.