Facet 9.3171 Ignition Knock (Detonation) Sensor

Reliable Ignition Knock Sensor for Audi and Volkswagen Models

The Facet 9.3171 Ignition Knock (Detonation) Sensor is designed to provide accurate knock detection for select Audi and Volkswagen vehicles. This sensor helps maintain engine performance by detecting abnormal combustion and allowing the engine control unit to adjust timing accordingly.

Key Features of Facet 9.3171 Knock Sensor

• Compatible with Audi A6 Quattro, A8 Quattro, R8, RS4, RS5, S5 and Volkswagen Phaeton, Q7, Touareg models
• Precision detection of engine knock for optimized ignition timing
• Durable construction to withstand engine heat and vibration
• Direct replacement part number 9.3171 for easy installation
• Ensures proper engine management and emission control

Detailed Product Description

The Facet 9.3171 ignition knock sensor is engineered to detect detonation or knocking within the engine cylinders of compatible Audi and Volkswagen vehicles. By sensing vibrations caused by abnormal combustion, it sends signals to the engine control module to adjust ignition timing and prevent engine damage. This sensor is essential for maintaining engine efficiency, reducing emissions, and protecting internal components. It is a direct fit replacement for the original equipment sensor, ensuring proper fit and function without modification.

Common Applications and Issues Addressed

• Prevents engine knocking and pinging in Audi A6 Quattro and Volkswagen Touareg
• Helps maintain smooth engine performance in Audi RS4 and RS5 models
• Supports emission control systems in Volkswagen Phaeton and Q7
• Reduces risk of engine damage due to detonation in Audi S5 and A8 Quattro
• Improves fuel efficiency by enabling accurate ignition timing adjustments

Installation Notes and Tips

• Ensure engine is cool before sensor replacement to avoid injury
• Locate the knock sensor on the engine block as specified in the vehicle service manual
• Use proper torque specifications when installing to prevent sensor damage
• Disconnect the battery before installation to avoid electrical issues
• Verify sensor connector is clean and securely attached after installation

Quality Assurance and Warranty Information

Facet manufactures the 9.3171 ignition knock sensor to meet or exceed OEM standards for durability and performance. Each sensor undergoes rigorous testing to ensure reliable operation under demanding engine conditions. While specific warranty terms may vary, Facet typically offers a limited warranty covering defects in materials and workmanship to provide confidence in product quality.