Bosch 77009WS Fuel Filter

Bosch Gasoline Fuel Filter 77009WS

Bosch 77009WS is a gasoline fuel filter built for in-line mounting in select Audi, Volkswagen, Jaguar, and Saab applications. It uses premium materials and Bosch fuel-system expertise to deliver high-efficiency filtration that helps protect the engine from fuel contamination.

The Bosch Gasoline Fuel Filter line is focused on maintaining clean fuel delivery and stable engine performance. For vehicles such as the Audi A4 Quattro, Audi A6 Quattro, and Volkswagen Passat, regular fuel filter service helps preserve injection-system performance and supports dependable drivability.

• In-line gasoline fuel filter for fuel-system service
• Engineered for 99% fuel filtration
• Built with premium-quality materials and modern production methods
• Supports clean fuel delivery to the injection system
• Direct replacement for select Audi, Volkswagen, Jaguar, and Saab applications

Detailed Product Overview

This Bosch fuel filter is designed for gasoline applications and is specified as an in-line unit. It is a practical replacement for vehicles that rely on consistent fuel cleanliness to maintain injector performance and engine operation. Bosch recommends replacing the fuel filter at the manufacturer’s service interval to help maintain high performance and extend engine life. This part cross-references 156711 and CAC9630 for the same application.

Compatible With select 1980-2005 vehicles, including Audi Allroad Quattro, Audi A6 Quattro, Audi A8 Quattro, Audi S6, Audi S8, Audi S4, Audi A4 Quattro, Audi A8, Audi 90, Audi 90 Quattro, Audi V8 Quattro, Volkswagen Passat, Jaguar Vanden Plas, Jaguar XJ6, and Saab 900. Fits 2001-2005 Audi Allroad Quattro, N/A; Fits 2000-2005 Volkswagen Passat, N/A; Fits 1998-2004 Audi A6 Quattro, N/A; Fits 1997-2003 Audi A8 Quattro, N/A; Fits 2002-2003 Audi S6, N/A; Fits 2001-2003 Audi S8, N/A; Fits 2000-2002 Audi S4, N/A; Fits 1996-2001 Audi A4 Quattro, N/A; Fits 1997-1999 Audi A8, N/A; Fits 1993-1995 Audi 90, N/A; Fits 1993-1995 Audi 90 Quattro, N/A; Fits 1990-1994 Audi V8 Quattro, N/A; Fits 1988-1990 Jaguar Vanden Plas, N/A; Fits 1988-1990 Jaguar XJ6, N/A; Fits 1980-1984 Saab 900, N/A.

Common Fuel Filter Issues It Can Address

• Restricted fuel flow caused by a clogged filter
• Contamination reaching the injection system
• Rough running related to poor fuel cleanliness
• Reduced engine performance from fuel delivery restriction
• Service interval replacement on Bosch fuel-filter applications

Installation Notes and Tips

Confirm the vehicle’s fuel type is gasoline and verify in-line mounting before installation. Match the part number 77009WS to the vehicle application and follow the manufacturer service procedure for fuel-system depressurization and filter replacement. For Audi A4 Quattro, Audi A6 Quattro, and Volkswagen Passat fuel filter service, always compare the existing filter configuration and connection style before removal.

Quality Assurance

Bosch fuel filters are produced with attention to fuel-system requirements and filtration efficiency. The brand recommends replacement at the manufacturer-specified interval to help maintain performance and prolong engine life.