Bosch 17131 Oxygen Sensor - Upstream

Bosch Wideband O2 Sensor for Audi

Bosch 17131 is an Actual OE Oxygen Sensor built as a wideband air/fuel sensor for precise upstream mixture monitoring. It is a specific-fit, heated replacement for select Audi applications, including 2017-2020 Audi A4 upstream and 2016-2018 Audi A6 and A6 Quattro upstream.

Key Features

• Wideband A/F oxygen sensor for continuous air-fuel ratio measurement across the full lambda range
• Heated design for faster sensor warm-up and stable operation
• Specific-fit replacement with 5-wire configuration and included wiring harness
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Oblong male connector with blade terminals
• Metal housing for OE-style durability
• Overall length: 16.1 in; harness length: 12.8 in

Product Details

Bosch 17131 uses wideband sensing technology to send detailed air-fuel ratio data to the ECU, helping the engine management system maintain accurate mixture control under changing load and temperature conditions. Bosch pioneered the planar pump-cell wideband design used in modern engine control, and this Actual OE Oxygen Sensor reflects that OE development history in a standard replacement format. For drivers searching for a Bosch oxygen sensor for Audi A4 upstream or a Bosch 17131 replacement for Audi A6 and A6 Quattro, this part matches the confirmed fitment and sensor configuration.

This part cross-references 06L906262F for the same application.

What It Helps Address

• Fault codes related to upstream oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn wideband sensor
• Rough idle or drivability issues tied to inaccurate mixture feedback
• Reduced fuel economy caused by poor sensor response
• Elevated emissions from delayed or inconsistent sensor output

Installation Notes

Install as a threaded upstream oxygen sensor in the confirmed factory location. Verify connector shape, terminal count, and harness routing before installation. Because this is a wideband sensor, correct placement and secure electrical connection are important for accurate ECU feedback. Use the vehicle service procedure for torque and connector handling.

Quality Assurance

Bosch supplies OE-developed oxygen sensor technology to the aftermarket, and this Actual OE Oxygen Sensor is built to the same application-specific standards used in modern engine management systems.

Confirmed Fitment

• Fits 2017-2020 Audi A4, Upstream
• Fits 2016-2018 Audi A6, Upstream
• Fits 2016-2018 Audi A6 Quattro, Upstream