Bosch 13806 Oxygen Sensor - Downstream, Downstream Rear or Upstream

Bosch OE Oxygen Sensor for Porsche Boxster

Bosch 13806 is a specific-fit, narrow-band heated oxygen sensor for select Porsche Boxster applications. It provides air-fuel-ratio feedback to the ECU for stable closed-loop fuel control and emissions monitoring.

Built on Bosch Actual OE Oxygen Sensor engineering, this replacement uses a threaded metal housing, a 4-wire harness, and a rectangular female connector for direct-fit service on the listed Porsche Boxster positions.

Key Features

• Specific-fit oxygen sensor for select Porsche Boxster models
• Narrow-band heated sensor design for faster closed-loop operation
• 4-wire configuration with included wiring harness
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Rectangular female connector and female pin terminals
• Standard replacement grade for OE-style service
• Bosch part number 13806

Product Details

Bosch 13806 is part of the Bosch Actual OE Oxygen Sensor line, which draws on Bosch’s long history of OE oxygen sensor development. The sensor uses a ceramic sensing element and controlled heater operation to deliver accurate switching-type O2 signal output under changing exhaust temperatures. For Porsche Boxster owners, this Bosch oxygen sensor supports precise feedback in upstream and downstream rear locations listed for 1997-2003 vehicles.

Fits 1997-1999 Porsche Boxster, upstream. Fits 1997-1999 Porsche Boxster, downstream. Fits 2000-2003 Porsche Boxster, downstream rear. This part cross-references 98660612601 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect 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 sensor position before ordering, since this Bosch 13806 application covers upstream, downstream, and downstream rear locations on select Porsche Boxster models. Confirm the 18 mm thread size, 22 mm hex size, 4-wire connector layout, and harness length against the original sensor before installation. Threaded sensors should be installed into a clean exhaust bung to help ensure proper sealing and accurate signal response.

Quality Assurance

Bosch supplies this oxygen sensor as an OE-proven replacement backed by more than five decades of oxygen sensor development. The design uses high-temperature-resistant materials and heater control strategies intended to maintain consistent operation in demanding exhaust conditions.