Bosch 17431 Oxygen Sensor - Upstream

Bosch Wideband OE Oxygen Sensor

Bosch 17431 is an Actual OE wideband air-fuel oxygen sensor built for precise mixture feedback in modern engine management systems. It delivers continuous lambda measurement for accurate control of fuel delivery, performance, and emissions on select Volkswagen and Audi applications.

Key Features

• Wideband A/F oxygen sensor for high-precision air-fuel ratio monitoring
• Heated design for faster light-off and stable operation
• Specific-fit sensor with 5-wire harness and 6-terminal configuration
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing with oblong male connector and included wiring harness
• OE-style replacement built to match factory sensor requirements

Product Details

Bosch pioneered the wideband oxygen sensor design used in modern engine control, and this Bosch 17431 sensor follows that OE development path with a planar pump-cell construction and robust ceramic sensing element. It provides detailed feedback across the full lambda range, allowing the ECU to manage the air-fuel mixture more accurately than a traditional switching sensor. This makes it a direct-fit choice for select Volkswagen CC, Eos, GTI, Beetle, Jetta, Passat, and Audi A3 applications that require an upstream wideband sensor.

This part cross-references Bosch OE numbers 06J906262AD and 06J906262T for the same application.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn wideband sensor
• Rough idle, hesitation, or inconsistent throttle response caused by faulty feedback
• Reduced fuel economy from inaccurate mixture control
• Elevated emissions from degraded sensor response

Installation Notes

Fits 2010-2017 Volkswagen CC, Upstream. Fits 2009-2016 Volkswagen Eos, Upstream. Fits 2008-2014 Volkswagen GTI, Upstream. Fits 2008-2013 Audi A3, Upstream. Fits 2012-2013 Volkswagen Beetle, Upstream. Fits 2012-2013 Volkswagen Jetta, Upstream. Fits 2008-2010 Volkswagen Jetta, Upstream. Fits 2010 Volkswagen Passat, Upstream. Fits 2009 Audi A3 Quattro, Upstream, with 6 Pin Connector; Actual OE Oxygen Sensor.

Confirm connector style, harness routing, and upstream location before installation. Use the correct oxygen sensor socket and avoid contaminating the sensing element during handling. Bosch 17431 is a specific-fit replacement, so matching the vehicle’s original connector and thread specifications is important for proper installation.

Quality Assurance

Bosch backs this sensor with more than five decades of OE development in engine management and emissions technology. The design reflects Bosch’s factory-level approach to wideband sensing, heater control, and durable construction for demanding thermal conditions.