Bosch 17017 Oxygen Sensor - Upstream

Bosch Wideband O2 Sensor for BMW Diesel Applications

Bosch 17017 is an Actual OE wideband air-fuel oxygen sensor built for precise upstream mixture monitoring. It delivers continuous lambda measurement for accurate fuel control, stable engine operation, and lower emissions on supported BMW diesel applications.

Key Features

• Wideband A/F oxygen sensor for continuous air-fuel ratio measurement
• Heated design for faster sensor warm-up and stable operation
• Specific-fit replacement with 5-wire harness and oblong male connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing with robust ceramic sensor construction
• Wiring harness included with 15 in overall wire length
• Actual OE Oxygen Sensor line from Bosch

Product Details

Bosch 17017 is part of the Bosch Actual OE Oxygen Sensor line, which focuses on OE-style replacement sensors built to match modern engine management requirements. This wideband sensor provides detailed feedback to the ECU across the full lambda range, helping maintain accurate air-fuel control during idle, cruise, acceleration, and rapid load changes. Bosch’s wideband design uses a planar pump-cell architecture and optimized heater control to support fast light-off and consistent readings under demanding thermal conditions. For drivers searching for a Bosch 17017 oxygen sensor or a Bosch wideband O2 sensor for BMW 328d, this part is engineered for upstream placement and specific-fit installation.

Compatible With 2014-2017 BMW 328d, Upstream. Compatible With 2014-2017 BMW 328d xDrive, Upstream. Compatible With 2015-2017 BMW X3, Upstream. This part cross-references Bosch 13627791600 for the same application.

Common Issues This Sensor Can Address

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

Installation Notes and Tips

Verify upstream sensor location before installation and confirm connector shape, terminal count, and thread size match the original unit. The sensor uses a threaded mount with an 18 mm thread diameter and 22 mm hex size. Inspect the harness routing carefully so the 15 in lead is secured away from heat sources and moving components. Use proper oxygen sensor service tools and follow factory torque specifications during installation.

Quality Assurance

Bosch has more than five decades of OE development experience and supplies oxygen sensors to vehicle manufacturers and the aftermarket. Bosch 17017 is built as an Actual OE replacement for precise fitment and dependable sensor performance on supported BMW applications.