Bosch 15376 Oxygen Sensor - Downstream

Bosch Actual OE Oxygen Sensor 15376

Bosch 15376 is a specific-fit, narrow-band heated oxygen sensor for downstream applications. It provides the ECU with air-fuel-ratio feedback needed for stable closed-loop fuel control and emissions monitoring on select Hyundai and Kia models.

Compatible with 2006-2011 Hyundai Accent, downstream, and 2006-2011 Kia Rio and Rio5, downstream, this Bosch Actual OE Oxygen Sensor is built for direct replacement service. The Bosch 15376 part number is also referenced for OE-style service on these applications.

Key Features

• Specific-fit downstream oxygen sensor for select Hyundai Accent, Kia Rio, and Kia Rio5 applications
• Narrow-band heated design for faster sensor activity and closed-loop operation
• 4-wire configuration with square female connector and pin terminals
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Wiring harness included for direct replacement installation
• Metal housing and high-temperature-resistant construction for underbody service
• Bosch 15376 is part of Bosch’s Actual OE Oxygen Sensor line

Product Details

Bosch’s Actual OE Oxygen Sensor line draws on decades of original equipment development, including narrow-band sensor designs that improved response time and lambda accuracy over earlier oxygen sensor technology. Bosch 15376 uses a heated switching-type sensor element to deliver the signal the engine control unit uses for fuel trim correction and emissions control. For drivers searching for a downstream oxygen sensor for 2006-2011 Hyundai Accent or 2006-2011 Kia Rio/Rio5, this part provides the OE-style configuration needed for direct service replacement.

This part cross-references Hyundai/Kia OE number 3921026620 for the same application.

What It Helps Address

• Check engine light related to downstream oxygen sensor performance
• Incorrect air-fuel feedback affecting fuel trim control
• Emissions test failures tied to sensor response or signal quality
• Rough idle or drivability issues caused by inaccurate exhaust feedback
• Slow closed-loop transition after startup

Installation Notes

Verify connector shape, thread size, and downstream location before installation. The sensor uses an 18 mm thread and a square female connector with a 4-wire harness. Because this is a threaded oxygen sensor, proper removal and installation tools are recommended to avoid damage to the exhaust bung or sensor body.

Confirm vehicle application by year, make, model, and position before ordering. Bosch 15376 is listed for 2006-2011 Hyundai Accent downstream, 2006-2011 Kia Rio downstream, and 2006-2011 Kia Rio5 downstream.

Quality Assurance

Bosch backs this Actual OE Oxygen Sensor line with OE development experience and materials selected for heat and vibration exposure in exhaust service. The sensor is built to deliver consistent signal quality under demanding operating conditions and to meet the requirements of specific-fit replacement service.