Bosch 17008 Oxygen Sensor - Upstream

Bosch Wideband OE Oxygen Sensor

Bosch Part Number 17008 is an Actual OE wideband oxygen sensor built for precise air-fuel ratio measurement across the full lambda range. It is a direct-fit, heated sensor with a 5-wire design, making it a strong match for upstream BMW applications that require accurate feedback to the engine control unit.

Compatible With select BMW 135i, 135is, 335i, 335i xDrive, 335i GT xDrive, X1, and ActiveHybrid 3 upstream positions, Bosch 17008 supports accurate mixture control in demanding driving conditions. The wideband design provides more detailed signal data than a traditional switching sensor, helping the ECU manage fuel delivery and emissions with greater precision.

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, blade-terminal construction
• Rectangle male connector with included wiring harness
• Threaded mounting type with 18 mm thread diameter
• Metal housing and robust ceramic sensor construction
• Overall length: 27.0 in; harness length: 23.6 in

Product Details

Bosch 17008 is part of the Bosch Actual OE Oxygen Sensor line, which focuses on OE-style fit, signal accuracy, and durable construction for modern engine management systems. Bosch pioneered the wideband planar pump-cell sensor design used in current low-emission technology, and this sensor reflects that OE development with fast light-off and optimized heater control. For BMW drivers, that means dependable upstream feedback for models such as the BMW 335i, BMW X1, and BMW 135i when the engine needs precise mixture correction.

This part cross-references Bosch OE application 11787596924 for the same application.

Common Issues This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn upstream sensor
• Rough idle or hesitation caused by inaccurate mixture feedback
• Reduced fuel economy from poor ECU fuel control
• Higher emissions from delayed or unstable sensor response

Installation Notes

Install Bosch 17008 in the upstream position only where specified by the vehicle application. Verify the 18 mm thread size, 5-wire connector layout, and harness routing before installation. Because this is a specific-fit sensor, compare the connector shape, terminal type, and overall length to the original unit before final assembly. For best results, inspect the exhaust bung threads and clear any corrosion before threading in the new sensor.

Quality Assurance

Bosch supplies OE-developed oxygen sensors to the aftermarket using the same engineering approach trusted by vehicle manufacturers. Part Number 17008 is built to OE standards for accurate signal response, reliable heater performance, and long-term durability in BMW upstream applications.

• Fits 2014-2016 BMW 335i GT xDrive, Upstream
• Fits 2013-2015 BMW X1, Upstream
• Fits 2011-2013 BMW 135i, Upstream
• Fits 2013 BMW 135is, Upstream
• Fits 2011-2013 BMW 335i, Upstream
• Fits 2011-2013 BMW 335i xDrive, Upstream
• Fits 2013 BMW ActiveHybrid 3, Upstream