Bosch 16175 Oxygen Sensor - Downstream

Bosch Actual OE Oxygen Sensor 16175

Bosch 16175 is a specific-fit, narrow-band heated oxygen sensor built for downstream applications on select Saab vehicles. It provides the ECU with air-fuel-ratio feedback for stable closed-loop control, helping maintain consistent combustion and emissions performance.

Key Features

• Actual OE Oxygen Sensor from Bosch
• Narrow-band heated O2 sensor with 4-wire configuration
• Specific fit with threaded mounting and 18 mm thread size
• Blade terminals, rectangle connector, male connector and terminal ends
• Wiring harness included with 30.1 in harness length
• Metal housing with high-temperature-resistant construction
• Overall length: 33.5 in; sealing surface to connector end: 32.3 in

OE-Style Sensor Line

Bosch Actual OE Oxygen Sensor parts are based on Bosch’s long OE development history in oxygen sensing technology. This line uses ceramic sensing elements and controlled heater operation to deliver fast sensor response, accurate lambda feedback, and reliable closed-loop operation under heat and vibration. Bosch 16175 follows that OE-focused approach for downstream monitoring on Saab 9-5 and Saab 9-3 applications.

Fitment

• Fits 2000-2009 Saab 9-5, Downstream
• Fits 2000-2003 Saab 9-3, Downstream

What It Helps Address

• Check engine light related to oxygen sensor performance
• Unstable air-fuel ratio feedback to the ECU
• Slow sensor response during closed-loop operation
• Emissions test failures tied to downstream O2 sensor faults
• Rough combustion control caused by a worn narrow-band sensor

Installation Notes

Verify downstream placement, connector shape, wire count, and 18 mm thread size before installation. Use the threaded mounting point and confirm the harness routing matches the original sensor location on the vehicle. Bosch 16175 is a direct-fit replacement for select Saab 9-5 and Saab 9-3 applications, so matching the original connector and harness length is important for proper fit.

Quality Assurance

Bosch supplies OE-proven oxygen sensor technology to the aftermarket, drawing on more than five decades of development in air-fuel sensing and emissions control.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.