Bosch 15334 Oxygen Sensor - Upstream

Bosch Validated Oxygen Sensor 15334

Bosch Validated Oxygen Sensor 15334 is a narrow-band heated O2 sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management in applications such as Hyundai Santa Fe, Hyundai Santa Fe XL, Kia Sorento, and Kia Sedona.

Key Features

• Specific-fit oxygen sensor for direct application matching
• Narrow-band heated design for faster closed-loop operation
• 4-wire layout with square male connector and blade terminals
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Wiring harness included with 26.9 in harness length
• Metal housing and high-temperature-resistant construction for demanding exhaust conditions
• Bosch Validated Oxygen Sensor line reflects Bosch OE development experience

Product Details

Bosch part number 15334 uses a ceramic sensing element and optimized heater control to deliver consistent signal response across changing exhaust temperatures. This Bosch Validated Oxygen Sensor is a standard replacement choice for downstream right and upstream locations listed in the fitment data, including 2010-2018 Hyundai Santa Fe, 2019 and 2013 Hyundai Santa Fe XL, 2011-2017 Kia Sorento, 2011-2012 Kia Sedona, 2006-2009 Hyundai Sonata, 2007-2009 Kia Magentis, 2007-2008 Kia Optima, 2007-2008 Kia Rondo, and 2006 Kia Optima late production. This part cross-references Monroe Shocks & Struts (e.g., 3921025300) for the same application.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Unstable air-fuel ratio feedback to the ECU
• Slow closed-loop response after startup
• Emissions test failures tied to sensor degradation
• Rough combustion control caused by inaccurate exhaust readings

Installation Notes

Verify the sensor position before ordering, since this application includes upstream and downstream right locations depending on vehicle. Confirm the 18 mm thread size, 4-wire connector style, and harness routing against the original sensor before installation. Use proper oxygen sensor service tools and follow the vehicle service procedure for removal and torque specification.

Quality Assurance

Bosch has more than five decades of OE oxygen sensor development behind this design. The Bosch Validated Oxygen Sensor 15334 is built with OE-proven engineering principles, including durable materials, heater control, and sensor accuracy for long-term service in Hyundai and Kia applications.