Wix 33521 Fuel Filter

WIX 33521 Fuel Filter Overview

The WIX 33521 fuel filter is a complete in-line fuel filter built for consistent fuel system protection in normal and severe driving conditions. It is a direct-fit style used on select Audi and Volkswagen applications, including popular models such as the Audi TT, Audi A4, and Volkswagen Jetta.

With 8 mm inlet and outlet connections, cellulose media, and a closed top design, this WIX fuel filter is made for dependable filtration in everyday driving, stop-and-go traffic, short trips, and highway use.

Key Features

• Part number: WIX 33521
• Fuel (complete in-line) filter style
• 8 mm inlet and 8 mm outlet
• Cellulose filter media
• Closed top design
• 6.800 in. height and 2.980 in. outer diameter
• Built for light-duty fuel system service
• Recommended for OEM fuel filter change intervals

Detailed Description

WIX engineers this fuel filter with application-specific media and durable construction to help maintain clean fuel delivery under a wide range of operating conditions. The cellulose media is selected for the fuel type and vehicle application, while the complete in-line format supports straightforward replacement on compatible Audi and Volkswagen fuel systems. This part cross-references Bosch 0 450 905 318 and FRAM G5870 for the same application.

Compatible With select Audi TT, Audi A4, Audi A4 Quattro, Audi A8 Quattro, Audi S4, Audi TT Quattro, Audi A3, and Volkswagen Beetle, Jetta, Golf, Phaeton, R32, Touareg, Polo, Beetle Cabrio, Jetta City, and Clasico applications. The WIX 33521 is a practical choice for drivers searching for an Audi TT fuel filter, Volkswagen Jetta fuel filter, or OEM-style replacement fuel filter for older VW and Audi platforms.

What This Fuel Filter Helps Address

• Fuel contamination from dirt and debris
• Restricted fuel flow caused by a loaded filter
• Rough running related to poor fuel filtration
• Maintenance replacement at OEM-style service intervals
• Fuel system protection during stop-and-go and highway driving

Installation Notes and Tips

Verify inlet and outlet size, filter length, and vehicle-specific fuel line routing before installation. This filter uses 8 mm connections and is listed for select Audi and Volkswagen models from 1998 through 2015, with fitment varying by engine and fuel system configuration. Confirm the original equipment part number and application notes, especially for vehicles marked with cartridge-type or pressure-regulator-related notes.

• Fits 2011-2015 Volkswagen Clasico, N/A
• Fits 2011 Audi TT, N/A
• Fits 2000-2006 Audi TT, N/A
• Fits 2008-2010 Audi A8 Quattro, N/A
• Fits 2004-2006 Audi A8 Quattro, N/A
• Fits 2006-2010 Volkswagen Beetle, N/A
• Fits 2003 Volkswagen Beetle, N/A
• Fits 2009-2010 Volkswagen Beetle, N/A
• Fits 2004-2007 Volkswagen Beetle, N/A
• Fits 1998-2002 Volkswagen Beetle, N/A
• Fits 2010 Volkswagen Beetle Cabrio, N/A
• Fits 2010 Volkswagen Jetta, N/A
• Fits 2000-2005 Volkswagen Jetta, N/A
• Fits 2008-2009 Audi S4, N/A
• Fits 2004 Audi S4, N/A
• Fits 2006-2008 Volkswagen Jetta, N/A
• Fits 2003 Volkswagen Jetta, N/A
• Fits 1999 Volkswagen Jetta, N/A
• Fits 2007-2008 Volkswagen Jetta City, N/A
• Fits 2007 Volkswagen Polo, N/A
• Fits 2002-2006 Audi A4 Quattro, N/A
• Fits 2005-2006 Audi S4, N/A
• Fits 2000-2006 Audi TT Quattro, N/A
• Fits 2000-2006 Volkswagen Golf, N/A
• Fits 1998 Volkswagen Golf, N/A
• Fits 2004-2006 Volkswagen Phaeton, N/A
• Fits 2002-2005 Audi A4, N/A
• Fits 1998-2004 Audi A3, N/A
• Fits 2004 Volkswagen R32, N/A
• Fits 2004 Volkswagen Touareg, N/A
• Fits 2003 Volkswagen Golf, N/A
• Fits 1999 Audi TT, N/A

Quality Assurance

WIX fuel filters are built with high-efficiency media and application-specific construction to support reliable engine protection across normal and severe driving conditions. The WIX 33521 follows OEM-style service intervals for the listed Audi and Volkswagen applications.