ACDelco 12687257 Heated Oxygen Sensor

The ACDelco 12687257 is a GM Genuine Parts heated oxygen sensor designed to monitor oxygen content in exhaust gases and optimize engine performance. This OE-quality sensor is engineered to rigorous GM standards and provides accurate feedback to the engine control module (ECM) for precise air/fuel ratio adjustment.

Key Features:

• GM Genuine Parts oxygen sensor for direct OE replacement
• Heated sensor design for faster response and improved cold-start performance
• Monitors oxygen levels in exhaust gases to maintain optimal 14.7:1 air/fuel ratio
• Helps optimize engine performance, fuel economy, and emissions control
• Designed, engineered, and tested to rigorous GM quality standards
• Backed by GM Replacement Parts Limited Warranty

This heated oxygen sensor detects the proportion of oxygen in exhaust gases, allowing the ECM to continuously adjust the air/fuel mixture for maximum efficiency. Proper oxygen sensor function is critical for maintaining peak engine performance and meeting emissions standards.