Bosch 13565 Oxygen Sensor - Upstream

Bosch Actual OE Oxygen Sensor 13565

Bosch 13565 is a narrow-band heated oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It is a specific-fit replacement for upstream applications on select Hyundai and Kia models, including Hyundai Elantra, Tucson, Tiburon, and Kia Sportage.

Key Features

• Actual OE Oxygen Sensor from Bosch’s OE-focused product line
• Narrow-band heated design for stable closed-loop operation
• Specific fit with threaded mounting and 18 mm thread diameter
• 4-wire configuration with rectangular male connector
• Wiring harness included; harness length measures 8 in
• Metal housing with blade terminals and 22 mm hex size
• Overall length: 11.3 in; sealing surface to connector end: 10.2 in

Product Details

Bosch 13565 uses a switching-type zirconia sensing element to report oxygen content in the exhaust stream so the engine control module can maintain the correct air-fuel ratio. Bosch developed this sensor family from its original OE oxygen sensor designs and later narrow-band planar technology, focusing on faster sensor response, accurate lambda control, and dependable heater performance under heat and vibration. For drivers searching for a Bosch 13565 oxygen sensor for Hyundai Elantra upstream or a Bosch 13565 oxygen sensor for Kia Sportage upstream, this part matches the OE-style configuration used on the listed vehicles.

This part cross-references Hyundai/Kia OE numbers 3921023500 and 3921023710 for the same application.

Used For These Issues

• Check engine light related to oxygen sensor performance
• Rough idle or unstable air-fuel control
• Inaccurate exhaust oxygen readings affecting fuel trim
• Slow closed-loop response after startup
• Emissions test failure tied to upstream sensor faults

Installation Notes

Install in the upstream sensor location only for the listed applications. Verify the 4-wire connector, threaded mount, 18 mm thread size, and harness routing before installation. Use the correct oxygen sensor socket and apply proper torque to the threaded bung. Confirm the connector locks fully and inspect nearby wiring for heat damage or contamination before clearing fault codes.

Quality Assurance

Bosch has more than five decades of OE oxygen sensor development behind this design. The Actual OE Oxygen Sensor line is built to the same type of engineering standards used by vehicle manufacturers, with ceramic sensing elements, controlled heater operation, and high-temperature materials for consistent performance.