Bosch 16825 Oxygen Sensor - Downstream

Bosch OE Oxygen Sensor for Porsche 911

Bosch 16825 is an Actual OE Oxygen Sensor built for precise air-fuel-ratio feedback to the ECU. It is a narrow-band heated downstream sensor for 2006-2008 Porsche 911 applications, helping maintain stable closed-loop fuel control and emissions performance.

Key Features

• Fits 2006-2008 Porsche 911, downstream
• Actual OE Oxygen Sensor from Bosch
• Narrow-band heated oxygen sensor design
• Specific fit with 4-wire harness and female connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Wiring harness included for direct replacement use
• Part number 16825 for application matching and catalog lookup

Product Details

Bosch 16825 uses a switching-type narrow-band design to report exhaust oxygen content to the engine control unit. Bosch developed this sensor line from its original OE oxygen sensor work and later planar narrowband technology, focusing on faster sensor response, accurate lambda feedback, and reliable closed-loop operation. For Porsche 911 owners servicing the downstream position, this sensor supports consistent emissions monitoring and fuel control under normal driving and thermal load conditions. Bosch 16825 is also referenced for the same application under cross-reference part number 99760617702.

Common Issues It Can Address

• Check engine light related to downstream oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Slow sensor response during closed-loop operation
• Emissions test failures tied to oxygen sensor readings
• Rough fuel control caused by a worn narrow-band sensor

Installation Notes

Verify the downstream location, connector shape, wire count, and thread size before installation. This Bosch oxygen sensor uses a threaded mount, 4-wire configuration, and female connector; confirm the harness routing and sealing surface length match the original part on your Porsche 911. Use proper oxygen sensor service tools to avoid damaging the sensor body or exhaust threads.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development in oxygen sensing technology. The design uses high-temperature-resistant materials, ceramic sensing elements, and controlled heater operation for dependable performance in demanding exhaust environments.