Bosch 13011 Oxygen Sensor - Upstream

Bosch OE Oxygen Sensor for Porsche and BMW

Bosch 13011 is an Actual OE Oxygen Sensor built as a narrow-band heated replacement for precise air-fuel ratio feedback to the ECU. It is a specific-fit, threaded upstream sensor with a 3-wire harness, round connector, and 18 mm thread size for select Porsche 944, Porsche 924, Porsche 968, BMW M3, and BMW 318i applications.

Key Features

• Actual OE Oxygen Sensor from Bosch
• Narrow-band heated design for closed-loop fuel control
• Specific fit with threaded mounting and round connector
• 3-wire configuration with included wiring harness
• 22 mm hex size and 18 mm thread diameter
• Steel-finish metal housing for standard replacement use
• Part number 13011 for direct catalog lookup

Product Details

Bosch 13011 uses advanced ceramic sensing elements and controlled heater operation to deliver stable lambda feedback across changing exhaust temperatures. Bosch developed this oxygen sensor line from its original OE sensor designs, and the result is a replacement built for accurate upstream measurement, quicker closed-loop response, and consistent operation under heat and vibration. This part cross-references BMW 11781715263 and Porsche 94460613502 for the same application. For buyers searching for a Porsche 944 upstream oxygen sensor, BMW M3 upstream O2 sensor, or Bosch 13011 oxygen sensor replacement, this unit matches the confirmed OE-style configuration.

What It Helps Address

• Rich or lean air-fuel mixture readings at the ECU
• Check engine light concerns related to oxygen sensor performance
• Slow closed-loop fuel control response
• Unstable idle or drivability issues tied to upstream sensor feedback
• Emissions test failures caused by inaccurate exhaust oxygen measurement

Installation Notes and Tips

• Fits 1992-1995 Porsche 968, upstream.
• Fits 1988-1991 BMW M3, upstream.
• Fits 1989-1991 Porsche 944, upstream.
• Fits 1987-1988 Porsche 924, upstream, without California Emission System.
• Fits 1986-1988 Porsche 944, upstream, without California Emission System.
• Fits 1985 BMW 318i, upstream, from 12/1984.
• Confirm the connector style, thread size, and upstream location before installation.
• Use the existing threaded bung and route the harness away from exhaust heat and moving components.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development in engine management and emissions control. The Bosch Actual OE Oxygen Sensor line is engineered to meet the demands of original-equipment applications and aftermarket replacement needs with consistent sensor output and durable construction.