Bosch 15830 Oxygen Sensor - Downstream, Downstream Left or Downstream Right

Bosch OE Quality Oxygen Sensor 15830

Bosch 15830 is a narrow-band heated oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management across changing engine loads, making it a direct-fit replacement for select Hyundai, Kia, and Genesis applications.

Compatible with downstream positions on vehicles such as the Hyundai Palisade, Kia Telluride, and Genesis G90, this Bosch OE Quality Oxygen Sensor uses a threaded mounting design, 4-wire blade terminals, and a square connector for specific-fit service. The Bosch 15830 is engineered for consistent signal response in demanding heat and vibration conditions.

Key Features

• Specific-fit Bosch oxygen sensor for downstream applications
• Narrow-band heated sensor design for closed-loop fuel control
• 4-wire configuration with blade terminals and square connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing with high-temperature-resistant construction
• Wiring harness length: 10.4 in; overall length: 13.8 in
• OE Quality Oxygen Sensor line backed by Bosch OE development experience

Product Details

Bosch’s OE Quality Oxygen Sensor line draws on decades of original-equipment development, including early thimble-style sensors and later planar narrowband designs that improved light-off speed, lambda accuracy, and closed-loop response. Part number 15830 uses a heated narrow-band sensing element and optimized heater control to deliver steady feedback to the engine management system. This helps maintain proper air-fuel ratio control on downstream sensor locations in vehicles such as the Hyundai Palisade, Kia Telluride, and Genesis G90. This part cross-references Hyundai/Kia OE numbers 392102GBC0 and 392103L500 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Erratic air-fuel ratio readings from a worn downstream sensor
• Slow closed-loop response after sensor aging or contamination
• Emissions test failures tied to inaccurate exhaust feedback
• Rough combustion control caused by degraded sensor output

Installation Notes and Tips

Verify the downstream left or downstream right position before ordering, since fitment varies by vehicle and engine layout. Confirm the 18 mm thread size, 22 mm hex size, 4-wire connector style, and square connector shape against the original sensor before installation. Use proper oxygen sensor service tools and inspect the harness routing so the 10.4-inch wiring harness length and 12.6-inch sealing-surface-to-connector length match the vehicle routing.

Compatible With 2020-2025 Hyundai Palisade, downstream left; 2020-2025 Kia Telluride, downstream left; 2017-2022 Genesis G90, downstream; 2021-2022 Kia Sportage, downstream; 2017-2020 Genesis G80, downstream; 2019-2020 Hyundai Santa Fe, downstream; 2019-2020 Kia K900, downstream; 2019-2020 Kia Sorento, downstream right; and 2018-2019 Hyundai Sonata, downstream.

Quality Assurance

Bosch manufactures this oxygen sensor as part of its OE Quality line, using ceramic sensing elements, heater control strategies, and high-temperature materials developed from long-term OE sensor engineering. The result is a replacement sensor built to match the electrical and mechanical requirements of the listed applications.