DENSO 4551OE OE Style Oxygen Sensor

The DENSO 4551OE (234-4551) is an OE-style oxygen sensor engineered to meet original equipment specifications for precise emissions control and optimal engine performance. This high-quality O2 sensor monitors the air-fuel mixture under idle, moderate acceleration, and cruise conditions to maximize fuel efficiency while reducing harmful emissions.

Advanced Features:

• Aluminum-oxide trap layer protects ceramic element from silicone and lead poisoning, preventing damage to the platinum electrode
• Double protection cover maintains proper operating temperature for quicker response times and shields the ceramic element from contamination
• Stainless steel housing resists corrosion and contamination with rugged, watertight construction
• Porous PTFE filter allows atmospheric oxygen to enter the sensor while preventing water and engine contaminants from seeping into the casing
• Wiring harness length of approximately 20.55 inches for proper installation
• Manufactured and tested to strict OE standards for unparalleled performance

DENSO First Time Fit oxygen sensors are precision-built for exact replacement and reliable operation. Each component is designed to adhere to OE standards within incredibly close tolerances, ensuring proper catalytic converter operation, improved fuel economy, and compliance with emissions standards.