Delphi ES20069 Oxygen Sensor - Rear, Rear Left or Rear Right

Delphi ES20069 Heated Oxygen Sensor Overview

The Delphi ES20069 is a heated oxygen sensor designed for precise emission control in select Mazda vehicles. Engineered to meet OEM specifications, this sensor supports efficient fuel management and reduced emissions for Mazda 626, Millenia, and MX-6 models.

• Heated oxygen sensor with 4-wire design for accurate readings
• Square connector shape ensuring secure electrical connection
• Thread size of 18 x 1.5 mm for proper fitment
• Overall length of 680.0 mm for correct installation depth
• Position-specific fitment for rear, rear left, and rear right locations
• Includes oxygen sensor and instruction sheet for installation guidance

Technical Details and Compatibility

The Delphi ES20069 oxygen sensor features a heated element that allows it to reach optimal operating temperature quickly, improving sensor response time and engine performance. Its 4-wire configuration supports both the sensor signal and heater circuit, which is essential for maintaining accurate air-fuel ratio measurements. The square connector shape is designed to match factory wiring harnesses on compatible Mazda models, ensuring a reliable electrical connection. With a thread size of 18 x 1.5 mm and an overall length of 680 mm, this sensor fits precisely in the rear positions of Mazda 626, Millenia, and MX-6 vehicles, including rear left and rear right locations as specified by the vehicle’s emission system requirements.

Common Applications and Problem Resolution

• Restores accurate oxygen level readings for improved fuel efficiency
• Helps resolve check engine light issues related to oxygen sensor faults
• Reduces emissions by ensuring proper air-fuel mixture control
• Prevents engine performance problems caused by faulty sensor signals
• Supports compliance with emission regulations for compatible Mazda models

Installation Notes and Tips

When installing the Delphi ES20069 oxygen sensor, ensure the vehicle is cooled down to avoid burns. Use the included instruction sheet for guidance on sensor orientation and torque specifications. Verify the sensor’s connector matches the factory harness to prevent electrical issues. It is recommended to apply anti-seize compound on the threads to facilitate future removal. Proper installation in the rear, rear left, or rear right position is critical for accurate sensor operation and emission control.

Quality Assurance and Warranty

Delphi manufactures the ES20069 oxygen sensor to meet strict quality standards, ensuring durability and reliable performance. This sensor undergoes rigorous testing to comply with OEM specifications for Mazda 626, Millenia, and MX-6 models. While specific warranty details may vary, Delphi typically offers coverage against manufacturing defects to provide confidence in product longevity and function.