Walker 250-25190 Oxygen Sensor - Upstream, Upstream Rear or Upstream Right

Walker OE Base Oxygen Sensor 250-25190

Walker OE Base Sensor 250-25190 is a heated wide-band oxygen sensor built for specific vehicle applications and exact sensor placement. It provides ECU feedback for air-fuel control on select Genesis, Hyundai, and Kia models, including upstream right and upstream positions.

Key Features

• Heated wide-band oxygen sensor for precise exhaust feedback
• Specific-fit design for the listed application and position
• 5-wire design with oblong female connector and male terminals
• M18 x 1.5 thread size with 22 mm wrench size
• Engineered as an OE replacement sensor for modern engine management systems

Product Details

The Walker OE Base Sensor line is focused on direct-fit engine management components for vehicles that rely on accurate oxygen sensor input to manage fuel delivery and emissions. Part number 250-25190 is designed for the exact mounting location and connector style required by the application, helping the ECU receive the correct diagnostic signal from the exhaust stream. This part number is listed for Genesis G80, G90, GV70, GV80, and GV80 Coupe, plus Hyundai Santa Cruz, Santa Fe, Sonata, and Kia K5 and Sorento applications.

Walker Products has supplied engine management and oxygen/air-fuel sensors since 1946 and manufactures parts to application-specific fitment standards. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by incorrect air-fuel feedback
• Rough engine operation from inaccurate exhaust sensing
• Elevated exhaust emissions from a failing upstream sensor
• Fault codes stored in the ECU for sensor or related system issues

Installation Notes

Verify the connector shape, wire count, thread size, and sensor position before installation. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear, since damaged wiring can shorten sensor life and affect signal quality. Confirm the vehicle uses the listed upstream right or upstream sensor location before ordering.

Quality Assurance

Walker Products manufactures this oxygen sensor as an OE-style replacement for the specified application and position. The brand operates under ISO 9001/TS 16949 quality standards and develops sensors for diagnostic feedback required by the ECU.