Delphi ES20368 Oxygen Sensor - Rear or Rear Left

Delphi ES20368 Heated Oxygen Sensor Overview

The Delphi ES20368 is a heated oxygen sensor designed for precise emission control in various BMW models. Engineered with a 4-wire configuration and a round connector, this sensor ensures accurate air-fuel mixture readings for optimal engine performance.

• Heated oxygen sensor with 4 wires for reliable signal transmission
• Round connector shape for secure and proper fitment
• Thread size of 18 x 1.5 mm compatible with specified BMW models
• Overall length of 600 mm for correct installation depth
• Includes oxygen sensor and instruction sheet for installation guidance
• Positioned for rear or rear left placement depending on vehicle specifications

Technical Details and Compatibility

The Delphi ES20368 oxygen sensor is engineered to meet the emission control requirements of a wide range of BMW vehicles, including the 1 Series M, 128i, 135i, 3 Series variants such as 325i, 328i, 330i, 335i, and 5 Series models like 528i, 535i, 550i, as well as the 6 Series, 7 Series, X3, X5, X6, and Z4. Its heated sensor type allows for faster activation and more accurate oxygen level readings, which is critical for maintaining efficient combustion and reducing emissions. The 4-wire design supports both the sensor signal and heater circuit, ensuring consistent performance under various operating conditions.

Common Applications and Problem Resolution

• Helps correct engine misfires caused by inaccurate oxygen readings
• Reduces excessive fuel consumption by optimizing air-fuel mixture
• Addresses check engine light triggers related to oxygen sensor faults
• Improves emission control system efficiency for compliance with regulations
• Prevents rough idling and poor acceleration linked to faulty sensors

Installation Notes and Tips

When installing the Delphi ES20368 oxygen sensor, ensure the thread size of 18 x 1.5 mm matches the vehicle’s sensor port. The sensor’s overall length of 600 mm allows for proper positioning in the rear or rear left exhaust manifold or pipe, depending on the specific BMW model. Use the included instruction sheet for detailed installation steps. It is recommended to disconnect the battery before installation and to use an anti-seize compound on the threads to facilitate future removal. Verify connector compatibility with the round connector shape to avoid electrical connection issues.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM specifications, ensuring reliable performance and durability. The ES20368 part number undergoes rigorous testing to comply with emission standards and vehicle requirements. While specific warranty details may vary, Delphi typically offers coverage against manufacturing defects to provide confidence in product quality.