Bosch 13924 Oxygen Sensor - Upstream

Bosch OE Oxygen Sensor for Porsche 911

Bosch 13924 is a specific-fit, narrow-band heated oxygen sensor for select Porsche 911 applications. It provides direct air-fuel ratio feedback to the ECU for stable closed-loop control, cleaner combustion, and consistent emissions performance.

Key Features

• Fits 1984-1994 Porsche 911, upstream
• Fits 1994 Porsche 911, upstream, early production
• Fits 1994 Porsche 911, upstream, old body style
• Actual OE Oxygen Sensor line from Bosch
• Narrow-band heated sensor with 3-wire design
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Round connector with blade pin terminals
• Wiring harness included for direct replacement use
• Steel-finish, metal-housing construction for high-heat exhaust locations

Product Details

Bosch 13924 is built for upstream exhaust placement on Porsche 911 models where accurate oxygen sensing is critical to fuel control. As part of Bosch’s Actual OE Oxygen Sensor line, this sensor reflects the company’s long OE development history, including narrow-band and planar sensor technology focused on faster light-off, improved lambda accuracy, and quicker closed-loop operation. The result is a replacement oxygen sensor engineered around precise signal delivery and durable operation under thermal and vibration load.

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
• Rough idle or unstable air-fuel control
• Increased exhaust emissions from inaccurate sensor feedback
• Delayed closed-loop operation after startup
• Fuel trim problems caused by a worn upstream sensor

Installation Notes and Tips

Confirm the vehicle is a Porsche 911 with upstream sensor placement before ordering Bosch 13924. Verify the 18 mm thread size, 22 mm hex, round connector, and 3-wire configuration against the original sensor. Because this is a threaded exhaust sensor, inspect the bung threads and connector routing before installation, and replace only with the correct specific-fit application.

Quality Assurance

Bosch supplies OE-level oxygen sensor technology backed by more than five decades of development and aftermarket support. Bosch 13924 is part of the Actual OE Oxygen Sensor line, built to deliver consistent signal accuracy and durable service in demanding exhaust conditions.