Bosch 16624 Oxygen Sensor - Downstream

Bosch OE Oxygen Sensor for Saab 9-3

Bosch 16624 is a narrow-band heated oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It is a specific-fit replacement for downstream service on select Saab 9-3 and Saab 9-3X applications, including 2004-2011 Saab 9-3 and 2010-2011 Saab 9-3X.

Key Features

• Actual OE Oxygen Sensor from Bosch
• Narrow-band heated O2 sensor design
• Specific fit replacement with threaded mounting
• 4-wire harness with rectangular male connector
• 22 mm hex size and 18 mm thread diameter
• Wiring harness included for direct replacement routing
• Built with metal housing and high-temperature-resistant materials

Product Details

Bosch 16624 uses a switching-type sensor element to deliver accurate oxygen content readings for closed-loop fuel control. Bosch developed this sensor line from its OE oxygen sensor engineering, including planar narrowband technology that supports faster light-off, improved lambda accuracy, and quicker closed-loop operation. For Saab 9-3 and Saab 9-3X downstream service, Bosch 16624 provides the OE-style signal response needed for stable combustion control and emissions management.

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

Common Issues This Sensor Can Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Rough idle or unstable fuel control after sensor wear
• Increased emissions from a slow or inaccurate downstream sensor
• Delayed closed-loop operation during warm-up

Installation Notes and Tips

Install Bosch 16624 in the downstream position only where listed for the vehicle. Verify the connector shape, 4-wire configuration, 18 mm thread size, and 22 mm hex before installation. Because this is a threaded oxygen sensor, use the correct oxygen sensor socket and follow the vehicle service procedure for routing the harness away from heat and vibration.

Quality Assurance

Bosch backs this oxygen sensor line with more than five decades of OE development and aftermarket supply experience. The Bosch Actual OE Oxygen Sensor line is engineered to meet OE-proven standards for accuracy, durability, and consistent operation under demanding thermal and vibration conditions.