Bosch 15109 Oxygen Sensor - Downstream

Overview of Bosch Actual OE Oxygen Sensor 15109

The Bosch Actual OE Oxygen Sensor 15109 is designed for precise emission control in select BMW and Land Rover models. This narrow-band heated oxygen sensor ensures accurate air-fuel mixture readings to maintain optimal engine performance and emissions compliance.

• Specific fit for BMW 320i, 323Ci, 323i, 325Ci, 325i, 325xi, 328Ci, 328i, 330Ci, 330i, 330xi, 525i, 528i, 530i and Land Rover Range Rover, X3, X5, Z3, Z4
• Heated narrow-band oxygen sensor type for reliable operation
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• 35.9-inch wiring harness length with 4-wire blade terminals and round male connector
• Standard replacement grade with metal housing and steel finish
• Includes wiring harness for direct installation

About the Bosch Actual OE Oxygen Sensor Product Line

The Actual OE Oxygen Sensor line by Bosch is engineered to meet original equipment specifications, providing a direct replacement for factory-installed sensors. This ensures compatibility and performance consistency for vehicles requiring precise emission control components. The 15109 sensor maintains the integrity of the vehicle’s emission system by delivering accurate oxygen level readings, essential for engine management systems in BMW and Land Rover models.

Detailed Product Description and Features

This Bosch oxygen sensor features a narrow-band heated design, which allows it to reach operating temperature quickly for accurate measurement of exhaust oxygen content. The sensor’s metal housing and steel finish provide durability under high-temperature conditions. It includes a 35.9-inch wiring harness with four wires and blade terminals, terminating in a round male connector for a secure and specific fit. The threaded mounting type with an 18 mm diameter and 22 mm hex size facilitates straightforward installation. Weighing approximately 0.35 pounds, this sensor is engineered for precise fitment and reliable function in the specified BMW and Land Rover models.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for improved engine efficiency
• Resolves check engine light triggers related to oxygen sensor faults
• Helps reduce vehicle emissions to meet regulatory standards
• Prevents rough idling and poor fuel economy caused by faulty sensors
• Supports proper catalytic converter operation by providing correct sensor data

Installation Notes and Tips

• Ensure vehicle compatibility with Bosch part number 15109 before installation
• Use a 22 mm oxygen sensor socket for removal and installation
• Do not overtighten; torque to manufacturer specifications to avoid damage
• Inspect wiring harness and connector for damage before installation
• Allow the engine to cool before replacing the sensor to prevent burns

Quality Assurance and Warranty

Bosch oxygen sensors are manufactured to meet strict quality standards, ensuring reliable performance and durability. The Actual OE Oxygen Sensor 15109 is a standard replacement part designed to match OEM specifications. While specific warranty details may vary, Bosch typically offers coverage against defects in materials and workmanship to provide confidence in the product’s longevity and function.