Bosch 16977 Oxygen Sensor - Downstream

Overview of Bosch Actual OE Oxygen Sensor 16977

The Bosch Actual OE Oxygen Sensor 16977 is designed specifically for BMW 528i, 528i xDrive, and 528xi models. This direct fit, heated narrow-band oxygen sensor ensures accurate emission control and optimal engine performance by monitoring exhaust gases precisely.

• Compatible with BMW 528i, 528i xDrive, and 528xi
• Part number 16977 for exact replacement
• Heated narrow-band oxygen sensor for precise readings
• Threaded mounting type with 18 mm thread diameter
• 16-inch wiring harness length with 4-pin female connector
• Steel housing with 22 mm hex size for installation
• Standard replacement grade with direct fit design

About the Bosch Actual OE Oxygen Sensor Product Line

The Bosch Actual OE Oxygen Sensor line is engineered to meet original equipment specifications, providing reliable performance and durability. This product line focuses on delivering sensors that match the exact fit and function of factory-installed parts, ensuring seamless integration with vehicle systems. The 16977 sensor is part of this line, offering a standard replacement solution with a heated element and precise wiring configuration tailored for specific BMW models.

Detailed Product Description and Features

This Bosch oxygen sensor features a 16-inch wiring harness with four wires and a female 4-pin round connector, facilitating straightforward connection to the vehicle’s emission control system. The sensor is heated, which helps it reach operating temperature quickly for accurate oxygen level detection. Its metal housing and threaded mounting type with an 18 mm thread diameter provide secure installation and durability. The overall length of 19.4 inches and a sealing surface to connector length of 18.2 inches ensure proper fitment within the exhaust system. The sensor’s narrow-band design is optimized for precise air-fuel ratio monitoring, essential for maintaining emissions compliance and engine efficiency in BMW 528i, 528i xDrive, and 528xi vehicles.

Common Applications and Issues Addressed

• Replacement for faulty or worn oxygen sensors in BMW 528i, 528i xDrive, and 528xi
• Resolves engine performance issues related to incorrect air-fuel mixture
• Helps correct rough idling and poor fuel economy caused by sensor failure
• Addresses emission control system warning lights triggered by sensor faults
• Prevents increased exhaust emissions due to inaccurate oxygen readings

Installation Notes and Tips

Installation requires removing the old oxygen sensor and threading the Bosch 16977 sensor into the exhaust manifold or pipe. Use a 22 mm hex socket for proper tightening. Ensure the wiring harness is connected securely to the female 4-pin connector to maintain sensor functionality. No mounting bracket is included, so the sensor mounts directly via its threaded design. It is recommended to check for exhaust leaks after installation and clear any diagnostic trouble codes related to the oxygen sensor.

Quality Assurance and Warranty

Bosch oxygen sensors are manufactured to meet strict quality standards, ensuring reliable operation and longevity. The Actual OE Oxygen Sensor 16977 is a standard replacement part designed to match OEM specifications for fit and function. While specific warranty details are not provided here, Bosch typically offers limited warranties on their emission control components to cover defects in materials and workmanship.