Delphi ES20134 Oxygen Sensor - Rear, Rear Left or Rear Right

Delphi ES20134 Heated Oxygen Sensor Overview

The Delphi ES20134 is a heated oxygen sensor designed for precise emission control in select GM vehicles. Engineered with a 4-wire configuration and a square connector, this sensor ensures accurate air-fuel mixture readings for optimal engine performance.

• Heated oxygen sensor with 4 wires for reliable operation
• Square connector shape for secure and proper fitment
• Thread size of 18 x 1.5 mm compatible with specified GM models
• Overall length of 550 mm for correct installation depth
• Includes oxygen sensor and instruction sheet for installation guidance
• Position-specific fitment: rear, rear left, and rear right locations

Technical Details and Compatibility

The Delphi ES20134 oxygen sensor features a heated design that allows it to reach operating temperature quickly, improving sensor response time and reducing emissions during cold starts. Its 4-wire configuration supports both the sensor signal and heater circuit, ensuring consistent performance. The square connector shape and 18 x 1.5 mm thread size provide a secure and precise fit for rear oxygen sensor positions on compatible vehicles.

This sensor is compatible with a range of General Motors vehicles, including Cadillac CTS, Chevrolet Malibu and Silverado 1500 HD, GMC Sierra 2500 HD, Hummer H2, Pontiac G6, Saturn Aura, and Yukon XL 2500. The ES20134 part number is specific to rear oxygen sensor applications on these models, ensuring proper fit and function.

Common Applications and Problem Resolution

• Replaces faulty or failing rear oxygen sensors causing check engine light illumination
• Helps restore proper fuel mixture readings to improve engine efficiency
• Addresses rough idling or poor acceleration linked to oxygen sensor issues
• Reduces increased emissions due to sensor malfunction
• Prevents potential damage to catalytic converters from incorrect air-fuel ratios

Installation Notes and Tips

When installing the Delphi ES20134 oxygen sensor, ensure the vehicle is cooled down to avoid burns. Use the included instruction sheet for guidance on sensor location and wiring connections. Apply anti-seize compound to the threads if recommended by the vehicle manufacturer to facilitate future removal. Confirm the sensor is installed in the correct rear position (left or right) as specified for your vehicle model.

Quality Assurance and Warranty

Delphi oxygen sensors are manufactured to meet OEM specifications for durability and performance. The ES20134 undergoes rigorous testing to ensure accurate sensor output and heater function. This part comes with a limited warranty covering defects in materials and workmanship, providing confidence in its reliability for emission control applications.