Bosch 16565 Oxygen Sensor - Downstream or Upstream

Bosch Validated Oxygen Sensor for OE-Style Control

Bosch Validated Oxygen Sensor Part Number 16565 is a specific-fit, heated oxygen sensor built for precise air-fuel ratio feedback to the ECU. It supports stable combustion control and emissions management for select Hyundai and Kia applications, including upstream service on Hyundai Sonata, Tucson, Santa Fe, Elantra, Veloster, and Kia Forte, Soul, Sportage, Optima, Sorento, and more.

The Bosch Validated Oxygen Sensor line reflects Bosch’s OE development background and focuses on accurate signal response, durable construction, and consistent operation under heat and vibration. Part Number 16565 uses a threaded mounting design, a rectangular male connector, and an included wiring harness for direct replacement service on the listed vehicles.

Key Features

• Specific-fit Bosch oxygen sensor for select Hyundai and Kia applications
• Heated design for faster closed-loop operation
• Wide band oxygen sensor type with narrow-band sensor classification
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Rectangular male connector with 5-wire harness and 6 terminals
• Steel-finish, metal-housing construction for underhood durability
• Wiring harness included for the listed application

Detailed Description

Bosch Part Number 16565 is engineered for upstream oxygen sensor service where accurate exhaust feedback is critical to fuel control. Bosch uses advanced ceramic sensing elements, optimized heater control, and high-temperature-resistant materials to maintain signal consistency during cold starts, steady cruising, and high-heat operation. This helps the ECU manage air-fuel ratio with the precision expected from an OE-style replacement.

This Bosch Validated Oxygen Sensor is listed for 2015-2019 Hyundai Sonata, 2018-2020 Hyundai Tucson, 2019-2020 Hyundai Santa Fe, 2017-2020 Hyundai Elantra, 2019-2021 Hyundai Veloster, 2020-2024 Kia Forte, 2020-2022 Kia Soul, 2020-2022 Kia Sportage, 2016-2019 Kia Optima, and 2015-2019 Kia Sorento in the specified upstream positions. It also covers 2017-2018 Hyundai Santa Fe Sport upstream and 2017-2019 Kia Sportage upstream, plus 2017-2019 Kia Soul downstream where listed.

This part cross-references Hyundai/Kia OE numbers 392102B510 and 392102G240 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings at the ECU
• Rough idle or unstable combustion control
• Slow sensor response during closed-loop operation
• Emissions test failures tied to sensor output issues

Installation Notes and Tips

Confirm the exact year, make, model, and sensor position before ordering, since this part is application-specific. Match the threaded 18 mm mounting style, rectangular connector, and 5-wire harness layout to the original sensor before installation. For best results, inspect the connector, wiring routing, and exhaust threads for heat damage or contamination before replacing the sensor.

Because this is an upstream oxygen sensor on many listed vehicles, proper placement matters for accurate fuel control. Verify the vehicle’s original sensor configuration against the fitment list for your Hyundai Sonata, Tucson, Elantra, or Kia Sportage application before installation.

Quality Assurance

Bosch has more than five decades of OE oxygen sensor development behind this product line. The Validated Oxygen Sensor series is built to deliver OE-proven signal accuracy, heater performance, and durability for demanding thermal and vibration conditions.