Bosch 16826 Oxygen Sensor - Downstream

Bosch Actual OE Oxygen Sensor 16826

Bosch 16826 is a specific-fit, narrow-band heated oxygen sensor for downstream use on select Porsche applications. It is built to deliver accurate air-fuel-ratio feedback to the ECU, helping maintain stable combustion control and lower emissions under changing operating conditions.

For drivers and technicians servicing a Porsche 911, this Bosch Actual OE Oxygen Sensor follows OE-style engineering with a threaded metal housing, 4-wire configuration, and integrated wiring harness for a direct replacement on the listed application.

Key Features

• Specific-fit Bosch oxygen sensor for the listed Porsche 911 downstream position
• Narrow-band heated sensor design for closed-loop fuel control
• 4-wire, 4-terminal configuration with female connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Wiring harness included for the application-specific installation
• Metal housing built for high-temperature and vibration exposure

OE-Style Sensor Design

The Bosch Actual OE Oxygen Sensor line draws on Bosch’s long history of oxygen sensor development, including early thimble-style designs and later planar narrowband technology. Bosch 16826 uses advanced ceramic sensing elements and controlled heater operation to improve light-off response and maintain accurate lambda feedback once the engine reaches operating temperature. This helps the ECU manage fuel delivery more precisely on the Porsche 911, especially in downstream emissions monitoring.

This part cross-references Porsche 99760613803 for the same application.

What It Helps Address

• Fault codes related to downstream oxygen sensor performance
• Unstable air-fuel ratio feedback in closed-loop operation
• Elevated emissions from a worn or slow-responding sensor
• Rougher combustion control caused by inaccurate lambda readings
• Delayed sensor response after heat cycling or vibration exposure

Installation Notes

Fits 2007-2009 Porsche 911, downstream. Confirm the connector shape, 4-wire layout, threaded mounting, and sensor location before installation. Use the correct 18 mm thread size and 22 mm hex size during removal and tightening, and inspect the exhaust bung and harness routing for heat damage before fitting Bosch 16826.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development experience. The Actual OE Oxygen Sensor line is built to the same engineering standards used by vehicle manufacturers, with materials selected for thermal durability, accurate signal output, and consistent operation in demanding exhaust conditions.