Bosch 13564 Oxygen Sensor - Upstream

Bosch Actual OE Oxygen Sensor for Porsche 911

Bosch 13564 is a narrow-band heated oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It is a specific-fit, threaded replacement for select Porsche 911 upstream locations, including 1996-1997 and 1999-2001 models.

For Porsche 911 owners searching for an upstream oxygen sensor replacement, Bosch 13564 offers OE-style fitment with a 4-wire harness, oblong male connector, and integrated wiring harness for a direct service replacement.

Key Features

• Actual OE Oxygen Sensor line from Bosch
• Specific-fit replacement for select Porsche 911 upstream applications
• Narrow-band heated oxygen sensor design
• 4-wire configuration with blade terminals
• Threaded mounting with 18 mm thread size and 22 mm hex size
• Metal housing with high-temperature-resistant construction
• Wiring harness included
• Part number 13564 for catalog and search reference

Product Details

Bosch 13564 is engineered as a switching-type oxygen sensor that reports exhaust oxygen content to the engine control unit so fuel delivery can be adjusted accurately during closed-loop operation. Bosch developed this sensor line from its long OE history, moving from early thimble-style designs to planar narrowband technology that improves response time, lambda accuracy, and closed-loop transition speed. The result is a durable replacement sensor for emissions control service on the Porsche 911.

This part cross-references Monroe Shocks & Struts (e.g., 99360612801) for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rich or lean fuel mixture readings
• Delayed closed-loop fuel control
• Reduced emissions performance
• Rough idle or unstable combustion control caused by inaccurate exhaust feedback

Installation Notes and Tips

Compatible With 1996-1997 Porsche 911, upstream, and 1999-2001 Porsche 911, upstream. Confirm the connector shape, 4-wire layout, threaded mounting, and 18 mm thread size before installation. Use the correct oxygen sensor socket for the 22 mm hex and inspect the harness routing so the lead is not twisted or strained after installation.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development and aftermarket supply experience. The Actual OE Oxygen Sensor line is built to OE-proven standards for accurate signal output, stable heater control, and consistent performance under heat and vibration.