Facet 9.3173 Ignition Knock (Detonation) Sensor

Facet 9.3173 Ignition Knock Sensor

Facet 9.3173 is an ignition knock sensor for select Volkswagen and Audi turbocharged applications. It monitors engine vibration and sends knock feedback to the engine control system, helping maintain proper ignition timing under load.

Key Features

• Ignition knock (detonation) sensor for emission control and engine management systems
• Fits 2012-2013 Volkswagen Golf R, N/A, color-brown
• Fits 2008-2009 Audi TT, N/A, for Cyl.3,4
• Fits 2007-2009 Volkswagen Eos, N/A, 160mm harness
• Fits 2006-2008 Audi A3, N/A, for Cyl.3,4
• Fits 2006-2008 Volkswagen GTI, N/A, 160mm harness
• Fits 2006-2008 Volkswagen Jetta, N/A, 160mm harness
• Fits 2006-2008 Volkswagen Passat, N/A, 160mm harness

Detailed Description

This Facet 9.3173 knock sensor is built for direct-fit service on specific Audi A3, Audi TT, Volkswagen Golf R, Volkswagen GTI, Volkswagen Jetta, Volkswagen Passat, and Volkswagen Eos applications. It is used by the engine control system to detect detonation events so timing corrections can be made based on real engine feedback. The part number 9.3173 is a useful reference when matching the correct sensor to the listed vehicle and engine configuration.

This part cross-references 172286 and 182286 for the same application.

What It Helps Address

• Knock sensor fault codes
• Audible pinging or detonation under acceleration
• Reduced engine performance from incorrect timing control
• Check engine light related to knock sensor circuit issues
• Driveability problems on listed Volkswagen and Audi models

Installation Notes and Tips

Verify the harness length, cylinder application, and connector details before installation. This Facet 9.3173 sensor is listed with application-specific notes such as 160mm harness, for Cyl.3,4, and color-brown, so the exact vehicle match matters. Confirm the engine code and sensor location against the original part before replacement.

Quality Assurance

Facet manufactures engine management components for service replacement use. Part number 9.3173 is cataloged for the listed Audi and Volkswagen applications and should be matched carefully to the vehicle notes shown above.