Bosch 17027 Oxygen Sensor - Downstream or Upstream

Overview of Bosch Actual OE Oxygen Sensor 17027

The Bosch Actual OE Oxygen Sensor 17027 is designed specifically for select BMW models, including the 535d, 535d xDrive, and 740Ld xDrive. This heated wide-band oxygen sensor ensures accurate air-fuel mixture readings to support optimal engine performance and emissions control.

• Heated oxygen sensor for faster response times
• Specific fit for BMW 535d, 535d xDrive, and 740Ld xDrive
• 17.9-inch wiring harness length with 18-gauge wire
• Blade terminal type with male connector and terminal gender
• Wide-band sensor type with 6 terminals and 5 wires
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Durable metal housing with steel finish
• Includes wiring harness for direct replacement

Detailed Product Description

The Bosch Actual OE Oxygen Sensor 17027 is a standard replacement part engineered to meet OEM specifications for BMW diesel models such as the 535d, 535d xDrive, and 740Ld xDrive. Featuring a heated design, this sensor quickly reaches operating temperature to provide accurate oxygen level readings. The wide-band sensor technology allows for precise measurement of exhaust gases, which is critical for maintaining efficient combustion and reducing emissions.

This oxygen sensor includes a 17.9-inch wiring harness with 18-gauge wires and a male oblong connector, ensuring a secure and reliable electrical connection. The sensor is threaded with an 18 mm diameter and uses a 22 mm hex size for installation. Its metal housing and steel finish provide durability under harsh engine conditions. The Bosch Actual OE Oxygen Sensor line is known for delivering parts that match original equipment quality, making it suitable for specific BMW applications.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for BMW 535d and 740Ld xDrive models
• Helps resolve engine performance issues related to faulty oxygen sensors
• Reduces emissions by ensuring proper sensor feedback to the engine control unit
• Eliminates check engine light triggers caused by sensor failure
• Improves fuel efficiency by maintaining optimal combustion

Installation Notes and Tips

• Ensure compatibility with BMW 535d, 535d xDrive, and 740Ld xDrive before installation
• Use a 22 mm oxygen sensor socket for removal and installation
• Do not overtighten; follow torque specifications for the 18 mm threaded sensor
• Inspect wiring harness and connector for damage before installation
• Allow the engine to cool before replacing the sensor to avoid burns

Quality Assurance and Warranty

The Bosch Actual OE Oxygen Sensor 17027 is manufactured to meet strict quality standards, providing reliable performance and durability. Bosch offers a limited warranty on this sensor, covering defects in materials and workmanship under normal use. This ensures confidence in the sensor’s ability to maintain proper emissions control and engine efficiency for your BMW 535d, 535d xDrive, or 740Ld xDrive.