Bosch 15119 Oxygen Sensor - Downstream or Downstream Right

Bosch Validated Oxygen Sensor for Lexus GS300

Bosch Validated Oxygen Sensor 15119 is a narrow-band heated O2 sensor built for precise air-fuel-ratio feedback to the ECU. It supports stable combustion control and emissions management for the 2006 Lexus GS300, including downstream right and downstream applications.

The Bosch Validated Oxygen Sensor line reflects Bosch OE development in oxygen sensing, with a focus on accurate lambda measurement, faster closed-loop response, and durable operation under heat and vibration. Part number 15119 uses a threaded mounting design, a 4-wire harness, and a rectangular male connector for a direct-fit replacement on the listed vehicle applications.

Key Features

• Specific-fit oxygen sensor for listed 2006 Lexus GS300 applications
• Narrow-band heated sensor for closed-loop fuel control
• 4-wire design with included wiring harness
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Rectangular male connector with blade terminals
• Standard replacement grade for emission control service
• Bosch Validated Oxygen Sensor part number 15119

Detailed Product Overview

This Bosch oxygen sensor measures exhaust oxygen content and sends the signal needed for the engine control unit to adjust fuel delivery. On the 2006 Lexus GS300, accurate downstream sensor performance helps maintain proper emissions monitoring and supports consistent engine operation after the catalytic converter. Bosch part number 15119 is engineered with a heated narrow-band design, metal housing, and high-temperature materials for dependable service in demanding exhaust conditions.

This part cross-references 8946530710 and 8946530820 for the same application.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Rough or unstable closed-loop fuel control
• Emissions test failures tied to sensor response issues
• Delayed or inconsistent downstream sensor readings

Installation Notes and Tips

Fits 2006 Lexus GS300, downstream right. Fits 2006 Lexus GS300, downstream. Verify connector shape, wire count, and thread size before installation. Use the correct oxygen sensor socket and inspect the exhaust bung threads for damage or contamination before threading in the new sensor.

Quality Assurance

Bosch draws on more than five decades of OE oxygen sensor development, and the Validated Oxygen Sensor line is built to deliver OE-proven fit and signal performance for aftermarket replacement.