Bosch 17202 Oxygen Sensor - Upstream, Upstream Rear or Upstream Right

Bosch Wideband OE Oxygen Sensor

Bosch Actual OE Oxygen Sensor 17202 is a wideband air-fuel ratio sensor built for precise mixture monitoring across the full lambda range. It provides the ECU with detailed feedback for accurate fuel control, stable engine operation, and lower emissions in demanding driving conditions.

For BMW applications, this Bosch oxygen sensor 17202 matches specific upstream positions on select 2008-2012 models, including BMW 535i, 535i xDrive, 535xi, X6, 740i, and 740Li.

Key Features

• Wideband A/F oxygen sensor for continuous air-fuel ratio measurement
• Heated design for faster sensor activity and stable operation
• Specific-fit replacement with included wiring harness
• 5-wire configuration with 6 terminals and oblong male connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Robust metal housing for OE-style durability
• Overall length: 44.1 in; harness length: 40.7 in

Product Details

Bosch pioneered the wideband A/F oxygen sensor design and continues to supply OE-level sensor technology to the aftermarket. Part number 17202 uses a planar pump-cell design that measures air-fuel ratio more precisely than a traditional switching sensor, helping the engine control module manage fueling with greater accuracy under changing load and temperature conditions. This Bosch Actual OE Oxygen Sensor is a direct-fit, standard replacement option for select BMW models, including upstream right and upstream rear locations where specified. This part cross-references Bosch 17202 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings
• Rough idle or inconsistent engine response from faulty sensor feedback
• Reduced fuel economy caused by inaccurate mixture control
• Elevated emissions from delayed or unreliable sensor output

Installation Notes

Verify the connector shape, wire count, thread size, and sensor position before installation. This Bosch oxygen sensor 17202 is a specific-fit part for select BMW upstream applications, including 2008-2010 BMW 535i upstream and upstream rear positions, 2009-2010 BMW 535i xDrive upstream, 2008-2010 BMW X6 upstream, 2008 BMW 535xi upstream, and 2011-2012 BMW 740i and 740Li upstream right. Confirm the exact engine and cylinder-location notes listed for your vehicle before ordering.

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 OE-focused approach to wideband oxygen sensing, with fast light-off, optimized heater control, and ceramic construction for reliable operation in thermal cycling conditions.