Bosch 16073 Oxygen Sensor

Bosch Actual OE Oxygen Sensor for Audi and Volkswagen

Bosch Part Number 16073 is a specific-fit, narrow-band heated oxygen sensor built for precise air-fuel ratio feedback to the ECU. It supports stable combustion control and emissions management in applications such as the Audi A4, A6, A8 Quattro, S4, S6, S8, RS6, Allroad Quattro, and Volkswagen Passat.

The Bosch Actual OE Oxygen Sensor line reflects Bosch’s long OE development history, with sensor designs that evolved from early thimble-style units to planar narrowband technology for faster light-off and quicker closed-loop operation. Part Number 16073 uses a threaded mounting design, a 4-wire harness, and a 4-terminal blade connector for direct replacement service.

Key Features

• Specific-fit Bosch oxygen sensor for confirmed Audi and Volkswagen applications
• Narrow-band heated sensor type for closed-loop fuel control
• 4-wire design with included wiring harness
• Threaded mounting with 18 mm thread size and 22 mm hex size
• Oblong male connector with male blade terminals
• Built with ceramic sensing elements and high-temperature-resistant materials
• Bosch Part Number 16073 for OE-style replacement identification

Detailed Product Overview

Bosch 16073 is an Actual OE Oxygen Sensor engineered for accurate switching-type exhaust feedback in gasoline engine management systems. It measures oxygen content in the exhaust stream so the ECU can adjust fueling during upstream and downstream operation. This helps maintain consistent combustion control across changing load and temperature conditions. The sensor’s heated narrow-band design supports faster operating readiness, while Bosch’s OE-focused construction emphasizes durability under thermal cycling and vibration.

This part cross-references 1K0998262AB and 077906265AA for the same application. For buyers searching Bosch oxygen sensor 16073 for Audi A4, Audi A6 Quattro, or Volkswagen Passat, this part provides a direct replacement path for the listed OE-style applications.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Unstable air-fuel ratio feedback to the ECU
• Delayed closed-loop fuel control after startup
• Emissions test failures tied to sensor response issues
• Rough combustion control caused by aging narrow-band sensor output

Installation Notes and Tips

• Verify the exact position before ordering: upstream, downstream, downstream left, or downstream right, as listed for the vehicle.
• Confirm connector shape, terminal count, and harness length against the original sensor before installation.
• Use the correct 22 mm oxygen sensor socket and thread care practices during removal and installation.
• Inspect the exhaust bung threads and wiring routing to avoid heat damage or connector strain.
• Clear diagnostic trouble codes after installation and confirm sensor operation with a scan tool.

Quality Assurance

Bosch backs this Actual OE Oxygen Sensor line with more than five decades of OE development and aftermarket supply experience. The sensor is built to Bosch’s OE-proven standards for accuracy, thermal durability, and consistent signal response in demanding Audi and Volkswagen applications.

Compatible Vehicles

• Fits 2000-2005 Volkswagen Passat, Upstream
• Fits 2000-2005 Volkswagen Passat, Downstream
• Fits 2000-2004 Audi A6 Quattro, Downstream
• Fits 2000-2004 Audi A6 Quattro, Upstream
• Fits 2003-2004 Audi RS6, Downstream
• Fits 2003-2004 Audi RS6, Upstream
• Fits 2001-2003 Audi A8 Quattro, Downstream Right
• Fits 2001-2003 Audi A8 Quattro, Downstream Left
• Fits 2000-2003 Audi A8 Quattro, Downstream
• Fits 2002-2003 Audi S6, Downstream
• Fits 2002-2003 Audi S6, Upstream
• Fits 2001-2003 Audi S8, Downstream
• Fits 2000-2002 Audi S4, Upstream
• Fits 2000-2002 Audi S4, Downstream
• Fits 2000-2001 Audi A4, Downstream
• Fits 2000-2001 Audi A4, Upstream
• Fits 2000-2001 Audi A4 Quattro, Upstream
• Fits 2000-2001 Audi A4 Quattro, Downstream
• Fits 2000-2001 Audi A6, Downstream
• Fits 2000-2001 Audi A6, Upstream
• Fits 2001 Audi Allroad Quattro, Downstream
• Fits 2001 Audi Allroad Quattro, Upstream