Bosch 13823 Oxygen Sensor - Downstream

Bosch OE Oxygen Sensor for Audi A8

Bosch 13823 is an Actual OE Oxygen Sensor for downstream applications on select Audi A8 and Audi A8 Quattro models. It is built for direct replacement use in emission control systems where accurate exhaust feedback is needed for proper engine management.

Key Features

• Actual OE Oxygen Sensor from Bosch
• Downstream position application
• Direct fit for select Audi A8 and Audi A8 Quattro models
• Supports emission control system monitoring
• Bosch part number 13823

Detailed Description

Bosch 13823 is an OE-style oxygen sensor for the downstream location on 1997-1999 Audi A8 and 1997-1999 Audi A8 Quattro. As part of Bosch’s Actual OE Oxygen Sensor line, this sensor is intended to match the original equipment application for vehicles that rely on precise exhaust gas feedback after the catalytic converter. If you are replacing a downstream oxygen sensor on an Audi A8 or Audi A8 Quattro, Bosch 13823 provides the correct fitment reference for those model years.

This part cross-references Bosch 13823 for the same application.

What It Helps Address

• Check engine light related to downstream oxygen sensor faults
• Incorrect exhaust oxygen readings reported to the engine control system
• Emission control monitoring issues on Audi A8 and Audi A8 Quattro
• Rough or inconsistent fuel control caused by a failing sensor signal

Installation Notes and Tips

Fits 1997-1999 Audi A8, downstream. Fits 1997-1999 Audi A8 Quattro, downstream. Confirm the downstream sensor location before ordering and compare the connector and mounting style to the original part on the vehicle. Proper diagnosis of the fault code and exhaust system condition should be completed before replacement.

Quality Assurance

Bosch’s Actual OE Oxygen Sensor line is based on original equipment application coverage for the listed Audi models, helping ensure the replacement matches the intended downstream sensor position.