Bosch 15346 Oxygen Sensor

Bosch Validated Oxygen Sensor for Hyundai and Kia

Bosch Part Number 15346 is a narrow-band heated oxygen sensor built for specific Hyundai and Kia applications. It provides direct air-fuel-ratio feedback to the ECU for stable closed-loop control, accurate combustion management, and lower emissions across changing operating conditions.

The Bosch Validated Oxygen Sensor line reflects Bosch OE development experience and focuses on accurate signal response, durable construction, and consistent heater performance. This Bosch 15346 oxygen sensor is a direct-fit replacement for select Hyundai Genesis Coupe, Veracruz, Azera, Genesis, Sonata, Santa Fe, Entourage, and Kia Borrego, Sedona, Amanti, Sorento, and related applications.

Key Features

• Part Number: 15346
• Brand Line: Bosch Validated Oxygen Sensor
• Narrow-band heated oxygen sensor for precise ECU feedback
• Specific fit design with wiring harness included
• 4-wire configuration with blade terminals
• Threaded mounting, 18 mm thread size, 22 mm hex size
• Oblong male connector and male terminals
• Metal housing with high-temperature-resistant construction
• Wiring harness length: 10.6 in; overall length: 14 in

Detailed Description

Bosch developed its oxygen sensor technology from early thimble-style designs to later planar narrowband sensors that improve light-off speed, lambda accuracy, and closed-loop response. Part Number 15346 uses that OE-focused engineering approach in a standard replacement sensor for specific downstream and upstream positions on select Hyundai and Kia vehicles. It is a heated narrow-band oxygen sensor with a threaded mount, 4-wire layout, and integrated harness for a direct service replacement.

Fits 2010-2012 Hyundai Genesis Coupe, downstream; Fits 2007-2012 Hyundai Veracruz, downstream left; Fits 2006-2011 Hyundai Azera, upstream right and downstream left; Fits 2009-2011 Hyundai Genesis, downstream; Fits 2009-2011 Kia Borrego, downstream right, upstream left, and downstream left; Fits 2006-2010 Hyundai Sonata, downstream left and upstream right; Fits 2006-2010 Kia Sedona, downstream left and upstream right; Fits 2007-2009 Hyundai Santa Fe, downstream left; Fits 2007-2009 Kia Amanti, upstream right and downstream left; Fits 2007-2009 Kia Sorento, upstream left; Fits 2007-2008 Hyundai Entourage, upstream right and downstream left.

This part cross-references Hyundai/Kia OE numbers 392103C400 and 392103C700 for the same application.

What It Helps Address

• Faulty oxygen sensor signal causing unstable fuel trim control
• Check engine light related to O2 sensor performance or heater circuit faults
• Rough idle, hesitation, or inconsistent combustion feedback
• Increased emissions from inaccurate air-fuel-ratio measurement
• Delayed closed-loop operation after startup

Installation Notes and Tips

Confirm the sensor position before ordering, since this part is used in multiple upstream and downstream locations across different Hyundai and Kia models. Match the connector shape, 4-wire layout, and 18 mm thread size to the original sensor before installation. Use proper oxygen sensor service tools and inspect the harness routing to avoid heat damage or strain on the connector.

Quality Assurance

Bosch has more than five decades of OE oxygen sensor development, and this Validated Oxygen Sensor line is built to deliver OE-proven signal accuracy, heater control, and durability for service replacement use.