Bosch 15383 Oxygen Sensor

Bosch Oxygen Sensor for Ford and Lincoln

Bosch Part Number 15383 is a narrow-band heated oxygen sensor built for downstream applications on a wide range of Ford, Lincoln, Mazda, and Mercury vehicles. It provides precise air-fuel-ratio feedback to the ECU for stable combustion control and lower emissions, with OE-style fitment and a threaded mounting design.

The Bosch Engineered Oxygen Sensor line draws on Bosch’s long OE development history, including early thimble-style sensors and later planar narrowband designs that improve light-off speed, lambda accuracy, and closed-loop response. Bosch 15383 uses advanced ceramic elements, optimized heater control, and high-temperature-resistant materials for consistent operation in demanding thermal and vibration conditions.

Key Features

• Part Number 15383 Bosch Engineered Oxygen Sensor
• Narrow-band heated oxygen sensor for downstream use
• Specific fit replacement with threaded mounting
• 4-wire design with square connector and pin terminals
• Wiring harness included with 15-inch harness length
• 18 mm thread diameter, 22 mm hex size
• Metal housing with steel finish
• Standard replacement grade for OE-style service

Detailed Description

This Bosch oxygen sensor is engineered for downstream monitoring on applications such as Ford Explorer, Ford Flex, Ford Taurus, Ford F-150, Lincoln MKS, Lincoln MKZ, and Mazda CX-9. It measures exhaust oxygen content and sends accurate feedback to the engine control unit so the fuel system can maintain proper air-fuel balance during closed-loop operation. Bosch Part Number 15383 is a direct-fit style replacement for vehicles that require a narrow-band heated sensor with the listed connector and harness configuration.

This part cross-references Monroe Shocks & Struts (e.g., CA4118861) for the same application.

What It Helps Solve

• Check engine lights related to oxygen sensor performance
• Rich or lean fuel trim conditions caused by inaccurate exhaust feedback
• Slow closed-loop response after startup
• Emissions test failures tied to downstream sensor faults
• Rough combustion control from a worn heated O2 sensor

Installation Notes and Tips

Verify the position before ordering, since this Bosch 15383 application list includes downstream left, downstream right, downstream front, and downstream rear locations depending on vehicle. Confirm the connector shape, wire count, and thread size against the original sensor before installation. Use proper oxygen sensor service tools on the 22 mm hex and inspect the exhaust bung threads for damage before threading the sensor into place.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development experience. The Bosch Engineered Oxygen Sensor line is built to OE-proven standards for accuracy, durability, and stable operation across harsh heat and vibration exposure.