Bosch 5508WS Engine Air Filter

Bosch Workshop Air Filter 5508WS

Bosch Workshop Air Filter 5508WS is an engine air filter built for clean airflow and dependable engine protection. It is compatible with 2002-2009 Audi A4 and 2002-2009 Audi A4 Quattro applications, making it a direct-fit service part for common Audi maintenance needs.

Key Features

• Panel-style engine air filter for the Bosch Workshop Air Filter line
• High pleat count increases available filter media surface area
• High-velocity cellulose cured media with 98% filtering efficiency
• Polyurethane seal helps maintain surface integrity and sealing performance
• Seal material resists water and heat while adding elasticity
• Designed to keep intake air cleaner for engine protection and consistent performance

Product Details

The Bosch Workshop Air Filter line focuses on practical filtration performance for routine service. On part number 5508WS, the panel shape and 2.755906-inch height support OE-style fitment in the air box, while the pleated media is engineered to trap outside particles before they enter the engine. For Audi A4 and Audi A4 Quattro owners, this filter supports regular intake system maintenance with a design centered on airflow, sealing, and filtration efficiency. This part cross-references Bosch 5508WS for the same application.

What It Helps Address

• Dust and road debris entering the engine intake
• Restricted airflow from a dirty or loaded air filter
• Reduced filtration performance during routine service intervals
• Seal leakage caused by worn or heat-affected filter edges
• Airbox contamination in 2002-2009 Audi A4 and Audi A4 Quattro models

Installation Notes and Tips

Verify the air filter housing shape and dimensions before installation. Replace the filter during scheduled intake service, and inspect the airbox for debris, damaged sealing surfaces, or moisture before installing Bosch 5508WS. Confirm fitment against the vehicle’s engine air filter specification for your Audi A4 or Audi A4 Quattro.

Quality Assurance

Bosch designs this Workshop Air Filter with pleated cellulose media and a polyurethane seal to support filtration efficiency, sealing consistency, and resistance to water and heat exposure.