Bosch 15681 Oxygen Sensor - Downstream or Downstream Rear

Overview of Bosch Actual OE Oxygen Sensor 15681

The Bosch Actual OE Oxygen Sensor 15681 is designed specifically for select BMW models, including the 325Ci, 325i, 330Ci, 330i, 525i, 530i, and X3. This narrow-band heated oxygen sensor ensures accurate emissions control and optimal engine performance by providing precise air-fuel mixture data to the vehicle's engine management system.

• Specific fit for BMW 325Ci, 325i, 330Ci, 330i, 525i, 530i, and X3 models
• Heated narrow-band oxygen sensor for improved response time
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Includes a 35.9-inch wiring harness with 4 male blade terminals and an oblong male connector
• Constructed with durable metal housing finished in steel
• Standard replacement grade for reliable emissions control

About the Bosch Actual OE Oxygen Sensor Product Line

The Bosch Actual OE Oxygen Sensor line is engineered to meet original equipment specifications, providing a direct replacement for factory-installed sensors. This product line focuses on delivering precise sensor readings and durability, ensuring compatibility and performance consistent with the original part. The 15681 sensor maintains these standards, offering a reliable solution for BMW vehicles requiring a specific fit oxygen sensor.

Detailed Product Description

This Bosch oxygen sensor features a narrow-band heated design, which allows it to reach operating temperature quickly for accurate emissions monitoring. The sensor’s metal housing and steel finish provide durability under harsh engine conditions. It includes a 35.9-inch wiring harness with four wires and blade terminals, designed for a specific fit with BMW models listed. The threaded mounting type with an 18 mm diameter and 22 mm hex size ensures secure installation. The oblong male connector and four male terminals facilitate a precise electrical connection, maintaining signal integrity for the engine control unit.

Common Applications and Issues Addressed

• Restores proper air-fuel ratio readings for BMW 325Ci, 325i, 330Ci, 330i, 525i, 530i, and X3 models
• Resolves check engine light triggers related to oxygen sensor faults
• Improves fuel efficiency by providing accurate emissions data
• Reduces harmful exhaust emissions by ensuring correct sensor operation
• Prevents engine performance issues caused by faulty oxygen sensors

Installation Notes and Tips

• Ensure the vehicle is compatible with part number 15681 before installation
• Use a 22 mm oxygen sensor socket for removal and installation
• Verify the wiring harness length and connector type match the vehicle’s factory sensor
• Do not overtighten the sensor; torque to manufacturer specifications
• Inspect the wiring and connector for damage before installation

Quality Assurance and Warranty

The Bosch Actual OE Oxygen Sensor 15681 is manufactured to meet strict quality standards, ensuring reliable performance and durability. Bosch provides a standard replacement grade sensor designed to match original equipment specifications. While specific warranty details may vary, Bosch products typically come with a limited warranty covering defects in materials and workmanship.