Bosch 17117 Oxygen Sensor - Upstream

Bosch Wideband O2 Sensor for BMW X5

Bosch 17117 is an Actual OE wideband air-fuel oxygen sensor built for precise mixture feedback in modern engine management systems. It fits 2007-2010 BMW X5, upstream, for cylinder(s) 1, 2, and 3, and uses a heated wide-band design with a specific-fit harness for direct replacement service.

Key Features

• Fits 2007-2010 BMW X5, upstream, cylinder(s) 1, 2, and 3
• Wide-band oxygen sensor type for continuous air-fuel ratio measurement
• Heated design for faster sensor activity and stable operation
• Specific-fit configuration with included wiring harness
• 5-wire sensor with 6 terminals and oblong male connector
• Threaded mounting with 18 mm thread size and 22 mm hex
• OE-style replacement from Bosch Actual OE Oxygen Sensor line

Product Details

Bosch 17117 is part of Bosch’s Actual OE Oxygen Sensor line, which focuses on OE-level fit and sensor performance for modern emissions systems. This wideband A/F sensor provides detailed air-fuel ratio data across the full lambda range, allowing the ECU to make more exact fueling adjustments than a traditional switching sensor. Bosch’s planar pump-cell wideband design, fast light-off behavior, and controlled heater strategy support consistent readings during load changes and thermal cycling. For BMW X5 applications, this sensor is a direct-fit solution for upstream monitoring on cylinder(s) 1, 2, and 3.

This part cross-references 11787557756 for the same application.

Common Issues This Sensor Can Address

• Check engine light related to upstream oxygen sensor performance
• Incorrect air-fuel ratio readings in the BMW X5 engine management system
• Rough idle or drivability concerns tied to inaccurate exhaust feedback
• Reduced fuel economy caused by poor mixture control
• Emissions test failures linked to a failing wideband sensor

Installation Notes

Confirm the upstream location and cylinder application before installation on the BMW X5. The sensor uses a threaded mount with an 18 mm thread size, so the exhaust bung must match the specified thread diameter. Inspect the connector shape, terminal count, and harness routing before connecting the new sensor. Clear diagnostic trouble codes after installation and verify live data to confirm proper sensor response.

Quality Assurance

Bosch has more than five decades of OE development in oxygen sensor technology, and this part reflects that OE-focused engineering approach. Bosch 17117 is built as a standard replacement sensor for accurate exhaust feedback and dependable operation in emissions control systems.