Bosch 13661 Oxygen Sensor Heated Universal Sensor - 4-Wire O2

The Bosch 13661 Oxygen Sensor delivers precise emission control performance with advanced contamination protection technology. This heated 4-wire universal oxygen sensor is designed for after catalytic converter installation, providing accurate voltage signals to your engine's emission control computer for optimal fuel efficiency and emissions compliance.

Key Features:

• Premium ceramic construction with Zirconium or Titania and Yttrium elements for superior mechanical and thermal shock resistance
• Patented catalytically activated fine particle filter prevents contamination and ensures extended sensor life
• Dual-layer filtration system doubles protection against exhaust gas contamination
• Heated 4-wire design with 29.3-inch wire length for versatile installation
• OE-style silicone boots ensure proper fit, secure connection, and professional appearance
• Direct plug-in installation with no cutting or splicing required
• Helps prevent premature catalytic converter failure by maintaining proper air-fuel ratios
• Rigorously tested to deliver accurate performance and fuel economy savings

This Bosch oxygen sensor meets OE replacement standards and is designed to restore your vehicle's emission system to factory specifications. The advanced ceramic technology and dual filtration system work together to provide long-lasting, reliable performance in demanding exhaust environments.