Febi 30166 Accessory Drive Belt Tensioner Assembly

Accessory Drive Belt Tensioner for VW and Audi

Febi 30166 is an automatic accessory drive belt tensioner assembly built for select Volkswagen and Audi applications. It uses an aluminum housing with a plastic pulley, a 70.0 mm outside diameter, and a 24.0 mm pulley surface width for controlled belt tension in the auxiliary drive system.

Compatible With Volkswagen Jetta, Golf, GTI, GLI, Eos, Passat, Bora, and Audi A3, A3 Quattro, S3, and TT applications listed below. Febi 30166 is also referenced under OE-style part number 06F 903 315 for the same application.

Key Features

• Automatic operating mode for consistent accessory belt tension
• Aluminum housing for structural support in the belt drive system
• Plastic pulley construction with a 70.0 mm outside diameter
• 24.0 mm pulley surface width for proper belt tracking
• Febi part number 30166 for direct catalog identification

Detailed Product Overview

Febi febi 30166 is an accessory drive belt tensioner assembly used in the auxiliary belt system to maintain proper belt tension as engine speed changes. The automatic design helps keep the belt aligned and loaded correctly across the pulley path, which is important for stable operation of belt-driven accessories. This part number is commonly searched for Volkswagen Jetta tensioner assembly, Audi A3 belt tensioner, and Volkswagen GTI accessory drive belt tensioner replacement needs.

The febi product line is known for OE-style replacement components across European vehicle systems, and this tensioner follows the specified aluminum housing and plastic pulley construction for the listed fitments. If you are replacing a worn tensioner on a Volkswagen Jetta, Golf, or Audi TT, verify the pulley dimensions and application details against your original unit before installation. Febi 30166 also cross-references OE part number 06F 903 315 for the same application.

What This Part Helps Address

• Belt squeal caused by weak or inconsistent tension
• Accessory belt flutter or vibration at idle and under load
• Uneven belt tracking across the pulley path
• Noise from a worn tensioner pulley or internal mechanism
• Loss of proper belt tension in the auxiliary drive system

Installation Notes and Tips

Before installation, confirm the vehicle application, pulley width, and outside diameter match the original tensioner assembly. Inspect the accessory belt, idler pulleys, and surrounding drive components for wear so the new tensioner is not installed into a compromised belt system. For Volkswagen Jetta and Audi A3 applications, follow the factory service procedure for belt routing and tensioner positioning.

• Fits 2017-2018 Volkswagen Jetta, N/A
• Fits 2011-2015 Volkswagen Jetta, N/A
• Fits 2006-2008 Volkswagen Jetta, N/A
• Fits 2016 Volkswagen Jetta, N/A
• Fits 2009-2010 Volkswagen Jetta, N/A
• Fits 2005 Volkswagen Jetta, N/A
• Fits 2010-2013 Volkswagen Golf, N/A
• Fits 2004-2007 Volkswagen Golf, N/A
• Fits 2008-2012 Audi S3, N/A
• Fits 2011-2012 Volkswagen GTI, N/A
• Fits 2009 Volkswagen GTI, N/A
• Fits 2010 Audi TT, N/A
• Fits 2007 Audi TT, N/A
• Fits 2005-2010 Volkswagen Bora, N/A
• Fits 2010 Volkswagen Eos, N/A
• Fits 2010 Volkswagen GLI, N/A
• Fits 2009 Audi A3, N/A
• Fits 2004-2005 Audi A3, N/A
• Fits 2004-2009 Audi A3 Quattro, N/A
• Fits 2008-2009 Audi TT, N/A
• Fits 2007-2009 Volkswagen Eos, N/A
• Fits 2009 Volkswagen Passat, N/A
• Fits 2005 Volkswagen Passat, N/A
• Fits 2006-2008 Audi A3, N/A
• Fits 2006-2008 Volkswagen GTI, N/A
• Fits 2006-2008 Volkswagen Passat, N/A

Quality Assurance

Febi 30166 is built to match the listed OE-style application requirements for the specified Volkswagen and Audi vehicles. The aluminum housing, plastic pulley, and automatic operating mode are specified to support proper fitment in the accessory drive belt system.