Facet 10.8550 Oxygen Sensor

Facet 10.8550 Oxygen Sensor for Hyundai and Kia

Facet 10.8550 is a downstream oxygen sensor for select Hyundai and Kia applications. It is a direct-fit emission control replacement for vehicles that use the OE-style sensor location and connector layout specified by the application.

Key Features

• Downstream oxygen sensor for emission control system service
• Direct replacement for select Hyundai and Kia models
• OE cross-reference: Hyundai/Kia 3921003AA5
• Facet part number 10.8550 for catalog and service identification
• Fits a broad range of 2012-2021 Hyundai and Kia vehicles

Application Details

Compatible With 2021 Kia Seltos, downstream; 2012-2019 Hyundai Accent, downstream; 2017-2019 Hyundai Elantra, downstream; 2018-2019 Hyundai Elantra GT, downstream; 2017-2019 Hyundai Ioniq, downstream; 2018-2019 Hyundai Kona, downstream; 2015-2019 Hyundai Sonata, downstream; 2017-2019 Kia Niro, downstream; 2016-2019 Kia Optima, downstream; 2012-2019 Kia Rio, downstream; 2014-2019 Kia Soul, downstream; 2016-2018 Hyundai Tucson, downstream; 2014-2018 Kia Forte5, downstream; 2012-2017 Hyundai Veloster, downstream; and 2014-2017 Kia Forte Koup, downstream. This part cross-references Hyundai/Kia 3921003AA5 for the same application. Facet 10.8550 is the downstream sensor position used to monitor exhaust after the catalytic converter on the listed vehicles.

What It Is Used For

• Replacing a failed downstream oxygen sensor
• Addressing check engine light concerns tied to O2 sensor performance
• Restoring proper exhaust monitoring after the catalytic converter
• Correcting drivability or fuel-control faults related to sensor signal issues
• Servicing emission control diagnostics on supported Hyundai and Kia models

Installation Notes

Verify the vehicle year, make, model, and downstream sensor location before ordering. Compare the connector, harness routing, and sensor placement to the original part on the vehicle. Use the application list to confirm fitment for your Hyundai Accent, Kia Soul, or other listed model before installation.

Quality Assurance

Facet emission control components are cataloged for OE-style replacement use, and this sensor is identified by part number 10.8550 for accurate service matching.