Delphi ES20376 Oxygen Sensor - Rear, Rear Left or Rear Right

Delphi ES20376 Heated Oxygen Sensor Overview

The Delphi ES20376 is a heated oxygen sensor designed for precise emission control in select BMW and Mercedes-Benz models. Featuring a 4-wire configuration and a round connector, this sensor ensures accurate air-fuel mixture readings for optimal engine performance.

• Heated sensor type for faster warm-up and improved efficiency
• 4-wire design for reliable signal transmission
• Round connector shape for secure and proper fitment
• Thread size of 18 x 1.5 mm compatible with specified vehicles
• Overall length of 455.0 mm for correct installation depth
• Includes oxygen sensor and instruction sheet for installation guidance
• Position-specific fitment: rear, rear left, and rear right

Technical Details and Compatibility

The Delphi ES20376 oxygen sensor is engineered to meet the emission control requirements of various BMW and Mercedes-Benz vehicles, including models such as the BMW 525i, 530i, 550i, 650i, 750i, 750Li, 760Li, M3, X5, and X6, as well as Mercedes-Benz CLK55 AMG, CLK320, and CLK430. Its heated sensor design allows for quicker activation, reducing emissions during cold starts. The 4-wire configuration supports both the sensor heater circuit and signal output, ensuring accurate oxygen level readings. The round connector and 18 x 1.5 mm thread size provide a secure and precise fit in the exhaust system, while the 455 mm overall length accommodates proper sensor placement in the rear exhaust positions.

Common Applications and Problem Resolution

• Helps resolve engine performance issues related to incorrect air-fuel mixture
• Addresses check engine light triggers caused by faulty oxygen sensors
• Improves fuel efficiency by providing accurate oxygen level data to the engine control unit
• Reduces harmful emissions by ensuring proper catalytic converter function
• Prevents rough idling and hesitation linked to sensor malfunctions

Installation Notes and Tips

When installing the Delphi ES20376 oxygen sensor, ensure the vehicle is compatible with the specified fitment models. The sensor is designed for rear exhaust positions, including rear left and rear right locations. Use the included instruction sheet for detailed installation guidance. Proper torque on the 18 x 1.5 mm threaded sensor is essential to avoid leaks or damage. It is recommended to disconnect the battery before installation to prevent electrical issues. Verify connector compatibility and secure the round connector firmly to avoid signal interruptions.

Quality Assurance and Warranty

Delphi manufactures the ES20376 oxygen sensor to meet OEM standards for durability and performance. The heated sensor design undergoes rigorous testing to ensure reliable operation under various driving conditions. This part comes with a manufacturer-backed warranty covering defects in materials and workmanship, providing confidence in its long-term functionality.