Delphi ES10259 Oxygen Sensor

Delphi ES10259 Heated Oxygen Sensor Overview

The Delphi ES10259 is a heated oxygen sensor designed for precise emission control in select Mercedes-Benz models. Engineered to provide accurate air-fuel mixture readings, this sensor supports optimal engine performance and reduced emissions.

• Heated sensor type for faster warm-up and accurate readings
• Three-wire design ensuring reliable electrical connections
• Compatible with square and round connector shapes
• Thread size of 18 x 1.5 mm for secure installation
• Overall length of 755.0 mm for proper fitment
• Includes oxygen sensor and instruction sheet
• Positioned for upstream installation in the exhaust system

Technical Details and Compatibility

This Delphi oxygen sensor (part number ES10259) features a heated element that allows the sensor to reach operating temperature quickly, improving response time and emission control accuracy. The sensor’s three-wire configuration supports both signal and heater circuits, enhancing durability and performance. Its connector accommodates both square and round shapes, ensuring compatibility with factory wiring harnesses. The 18 x 1.5 mm thread size matches OEM specifications for a secure fit in the exhaust manifold or pipe. With an overall length of 755.0 mm, this sensor is designed to fit precisely in the upstream position of the exhaust system.

The ES10259 sensor is compatible with various Mercedes-Benz models, including the 260E, 300CE, 300E, 300SE, 300SEL, 300TE, and 560SL. This ensures proper fitment and function for these vehicles’ emission control systems.

Common Applications and Problem Resolution

• Helps maintain optimal air-fuel ratio for efficient combustion
• Reduces engine misfires caused by faulty oxygen sensor readings
• Prevents increased emissions and failed emissions tests
• Addresses poor fuel economy linked to sensor malfunction
• Improves engine performance by providing accurate exhaust gas data

Installation Notes and Tips

When installing the Delphi ES10259 oxygen sensor, ensure the vehicle is cool to avoid burns. Use the correct 18 x 1.5 mm thread size socket or wrench to avoid damaging the sensor or exhaust components. Verify the connector shape matches the vehicle’s wiring harness to ensure proper electrical connection. Follow the included instruction sheet for torque specifications and wiring guidance. It is recommended to inspect the exhaust system for leaks or damage before installation to ensure accurate sensor readings.

Quality Assurance and Warranty

Delphi manufactures the ES10259 oxygen sensor to meet or exceed OEM standards for durability and performance. Each sensor undergoes rigorous testing to ensure reliable operation under various driving conditions. While specific warranty details may vary, Delphi typically offers coverage against defects in materials and workmanship. Consult product documentation or authorized sources for exact warranty terms.