Delphi ES20378 Oxygen Sensor

Delphi ES20378 Heated Oxygen Sensor Overview

The Delphi ES20378 is a heated oxygen sensor designed for precise emission control in select Audi, Porsche, and Volkswagen vehicles. Engineered with a 4-wire configuration and a flat connector shape, this sensor ensures accurate air-fuel mixture readings for optimal engine performance.

• Heated oxygen sensor with 4 wires for reliable operation
• Flat connector shape for secure and easy connection
• Thread size of 18 x 1.5 mm compatible with specified vehicle models
• Overall length of 555.0 mm for proper fitment
• Includes oxygen sensor and instruction sheet for installation guidance
• Compatible with center right, rear, rear left, and rear right positions

Detailed Product Description

The Delphi ES20378 oxygen sensor is a critical component in the emission control system, designed to monitor oxygen levels in the exhaust gases. Its heated sensor type allows for faster warm-up times, improving sensor responsiveness and reducing emissions during cold starts. The 4-wire design supports both the sensor signal and heater circuit, ensuring consistent performance. The flat connector shape facilitates a secure electrical connection, minimizing the risk of disconnection or signal loss. With a thread size of 18 x 1.5 mm and an overall length of 555.0 mm, this sensor fits precisely in the designated positions such as center right, rear, rear left, and rear right on compatible vehicles.

Compatible Vehicles and Applications

This oxygen sensor is compatible with a range of Audi, Porsche, and Volkswagen models, including but not limited to:

• Audi A3 Quattro, A6 Quattro, A8 Quattro, RS4, RS5, S5, S6, S8
• Porsche Cayenne
• Volkswagen CC, Eos, Jetta, Passat, Q7, R32, Touareg

It is designed to replace faulty or worn oxygen sensors in these vehicles, ensuring proper emission control and engine efficiency.

Common Issues Addressed by the Delphi ES20378 Oxygen Sensor

• Incorrect air-fuel mixture readings causing poor fuel economy
• Check engine light triggered by faulty oxygen sensor signals
• Increased emissions due to sensor malfunction
• Engine performance issues such as rough idling or hesitation
• Failed emissions tests related to sensor failure

Installation Notes and Tips

When installing the Delphi ES20378 oxygen sensor, ensure the engine is cool to avoid burns. Use the correct tools to avoid damaging the sensor or threads. Verify the sensor position matches the specified locations (center right, rear, rear left, rear right) for your vehicle model. Follow the included instruction sheet carefully for proper wiring and torque specifications. Avoid over-tightening to prevent thread damage.

Quality Assurance and Warranty

Delphi manufactures the ES20378 oxygen sensor to meet OEM standards for durability and performance. While specific warranty details are not provided, Delphi products typically undergo rigorous testing to ensure reliability in emission control applications. For warranty information, refer to the product documentation or contact the manufacturer directly.