Bosch 17098 Oxygen Sensor - Upstream or Upstream Front

Bosch Wideband OE Oxygen Sensor

Bosch 17098 is an Actual OE Oxygen Sensor built for precise air-fuel ratio monitoring on select BMW applications. This wideband A/F sensor provides the ECU with continuous, high-resolution feedback for accurate mixture control, stable drivability, and lower emissions.

Compatible With BMW 128i, 328i, 335i, X3, Z4, and related models, Bosch 17098 is a direct-fit upstream sensor for specific exhaust locations. The Bosch Actual OE Oxygen Sensor line focuses on OE-style fit, fast response, and dependable signal accuracy for modern engine management systems.

Key Features

• Wideband A/F oxygen sensor for continuous lambda measurement
• Heated design for faster light-off and stable operation
• Specific-fit configuration with 5-wire harness and included wiring harness
• Blade terminals, oblong connector, and male connector/terminal design
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing with robust ceramic sensor construction
• Overall length: 55.9 in; sealing surface to connector end: 54.7 in

Product Details

Bosch 17098 uses wideband sensor technology to measure air-fuel ratio across the full lambda range, giving the engine control unit more detailed input than a traditional switching sensor. That level of feedback supports precise fuel delivery during idle, acceleration, and load changes. For BMW drivers searching for an upstream front oxygen sensor for 2006-2016 BMW 128i, 328i, 335i, X3, or Z4 applications, this part is built to match the original sensor style and electrical layout.

Bosch pioneered the first wideband A/F oxygen sensor and continues to supply OE-proven sensor technology to the aftermarket. Part number 17098 is also a direct cross-reference for BMW OE number 11787558055 for the same application.

Common Issues This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings at the ECU
• Rough idle or inconsistent throttle response
• Reduced fuel economy caused by inaccurate mixture control
• Elevated emissions from a slow or failing upstream sensor

Installation Notes

Install Bosch 17098 in the confirmed upstream or upstream front location listed for the vehicle. Verify connector shape, terminal count, thread size, and harness length before installation. Because this is a specific-fit sensor, compare the original sensor routing and exhaust-manifold location on the BMW 328i, 335i, X3, or Z4 before replacement.

• Fits 2009-2016 BMW Z4, Upstream Front
• Fits 2008-2013 BMW 128i, Upstream
• Fits 2007-2013 BMW 328i, Upstream Front
• Fits 2013 BMW 328i, Upstream Front
• Fits 2007-2013 BMW 328i, Upstream
• Fits 2009-2013 BMW 328i xDrive, Upstream Front
• Fits 2011-2013 BMW 335is, Upstream Front
• Fits 2008-2012 BMW 128i, Upstream Front
• Fits 2009-2012 BMW 328i xDrive, Upstream Front
• Fits 2011 BMW 1 Series M, Upstream Front
• Fits 2007-2011 BMW 323i, Upstream
• Fits 2006-2011 BMW Z4, Upstream
• Fits 2008-2010 BMW 135i, Upstream
• Fits 2007-2010 BMW 335i, Upstream
• Fits 2009-2010 BMW 335i xDrive, Upstream Front
• Fits 2008-2010 BMW 528i, Upstream
• Fits 2009-2010 BMW 528i xDrive, Upstream
• Fits 2007-2010 BMW X3, Upstream
• Fits 2007-2008 BMW 328xi, Upstream
• Fits 2007-2008 BMW 328xi, Upstream Front
• Fits 2007-2008 BMW 335xi, Upstream Front
• Fits 2008 BMW 528xi, Upstream
• Fits 2007 BMW 525i, Upstream
• Fits 2007 BMW 525xi, Upstream
• Fits 2007 BMW 530i, Upstream
• Fits 2007 BMW 530xi, Upstream
• Fits 2006 BMW 323i, Upstream
• Fits 2006 BMW 325i, Upstream
• Fits 2006 BMW 325xi, Upstream
• Fits 2006 BMW 330i, Upstream
• Fits 2006 BMW 330xi, Upstream
• Fits 2006 BMW 525i, Upstream
• Fits 2006 BMW 525xi, Upstream
• Fits 2006 BMW 530i, Upstream
• Fits 2006 BMW 530xi, Upstream

Quality Assurance

Bosch backs this sensor with more than five decades of OE development in engine management and emissions technology. The Actual OE Oxygen Sensor line is built to deliver OE-level signal accuracy, durable construction, and consistent performance for BMW applications that require a wideband upstream sensor.