Delphi ES10254 Oxygen Sensor

Delphi ES10254 Heated Oxygen Sensor Overview

The Delphi ES10254 is a heated oxygen sensor designed for precise emission control in select BMW models. Engineered with a 4-wire configuration and a round connector, this upstream sensor ensures accurate air-fuel mixture readings for optimal engine performance.

• Heated sensor type for faster activation 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 BMW models
• Overall length of 630.0 mm for correct installation depth
• Includes oxygen sensor and instruction sheet for reference

Technical Details and Compatibility

The Delphi ES10254 oxygen sensor is specifically engineered for upstream placement in BMW vehicles such as the 325i, 325is, 325iX, and 850CSi. Its heated sensor type allows it to reach operating temperature quickly, reducing emissions during cold starts. The 4-wire configuration supports both the sensor signal and the heating element, ensuring consistent performance. The round connector shape and 18 x 1.5 mm thread size provide a secure and precise fit, maintaining the integrity of the vehicle’s emission control system.

Applications and Problem Resolution

• Helps maintain proper air-fuel ratio for efficient combustion
• Reduces engine misfires caused by faulty oxygen sensor readings
• Prevents increased emissions and failed emissions tests
• Improves fuel economy by providing accurate sensor data
• Supports smooth engine idling and acceleration response

Installation Notes and Tips

When installing the Delphi ES10254 oxygen sensor, ensure the vehicle is compatible with the specified BMW models: 325i, 325is, 325iX, and 850CSi. Use the included instruction sheet for guidance on proper torque specifications and connector alignment. It is recommended to replace the sensor when the engine is cool to avoid injury and to apply anti-seize compound on the threads if reusing the sensor to facilitate future removal.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM standards for durability and performance. The ES10254 part number undergoes rigorous testing to ensure reliable operation within the emission control system. While specific warranty details are not provided here, Delphi products typically come with a limited warranty covering defects in materials and workmanship.