Bosch 15442 Oxygen Sensor - Downstream, Downstream Right or Upstream

Bosch Actual OE Oxygen Sensor 15442

Bosch 15442 is a narrow-band heated oxygen sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management in demanding operating conditions, making it a direct-fit replacement for select BMW and Rolls-Royce applications.

Key Features

• Specific-fit Bosch oxygen sensor for direct replacement use
• Narrow-band heated design for faster closed-loop operation
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• 4-wire harness with blade terminals and round male connector
• Metal housing with high-temperature-resistant construction
• Wiring harness included for the listed application
• OE-focused design backed by Bosch oxygen sensor development

Product Details

This Bosch Actual OE Oxygen Sensor line reflects Bosch’s long history in oxygen-sensor development, including early thimble-style designs and later planar narrowband technology. The result is a sensor that delivers accurate lambda feedback, quicker light-off, and reliable heater control for consistent operation under heat and vibration. Bosch 15442 is a standard replacement oxygen sensor for downstream locations on select BMW 760i, BMW 760Li, BMW 545i, BMW 645Ci, BMW 745i, BMW 745Li, and Rolls-Royce Phantom applications. This part number, 15442, is also referenced for OE-style replacement needs where exact fit and sensor response matter.

This part cross-references BMW 11787512567 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel mixture feedback to the ECU
• Slow closed-loop response after startup
• Emissions test failures tied to sensor degradation
• Rough combustion control caused by aging downstream sensor output

Installation Notes

• Fits 2004-2006 BMW 760i, downstream right.
• Fits 2003-2006 BMW 760Li, downstream right.
• Fits 2004-2006 Rolls-Royce Phantom, downstream right.
• Fits 2004-2005 BMW 545i, downstream right.
• Fits 2004-2005 BMW 645Ci, downstream.
• Fits 2002-2005 BMW 745i, downstream right.
• Fits 2002-2005 BMW 745Li, downstream right.
• Verify connector shape, thread size, and sensor location before installation.
• Use the correct oxygen-sensor socket and follow vehicle-specific service procedures.

Quality Assurance

Bosch supplies oxygen sensors with OE development experience and application-specific calibration for stable signal output. Bosch 15442 is built as an OE-style replacement for the listed BMW and Rolls-Royce applications, with materials selected for thermal durability and consistent sensor response.