Bosch 5388WS Engine Air Filter

Bosch Workshop Air Filter for Focus

The Bosch Workshop Air Filter 5388WS is an engine air filter built for 2009-2011 Ford Focus applications. It uses a panel shape with high-pleat construction and cellulose cured media to help keep outside particles out of the intake stream while maintaining airflow for everyday engine protection.

For Ford Focus owners looking for a direct-fit engine air filter, Bosch 5388WS is designed around a polyurethane seal that helps preserve filter surface area and maintain sealing performance against heat and water exposure. This Bosch Workshop Air Filter line focuses on clean intake air and consistent filtration efficiency.

Key Features

• Panel-style engine air filter for select Ford Focus models
• High pleat count for increased filter media surface area
• Cellulose cured media with 98% filtering efficiency
• Polyurethane seal for elasticity and sealing performance
• Built to help protect the engine from airborne contaminants
• Bosch part number 5388WS for catalog lookup and ordering

Product Details

Bosch Workshop Air Filter 5388WS is part of Bosch’s air filter program for workshop and replacement use. The filter media is engineered to trap fine debris before it reaches the engine, while the panel design supports steady airflow through the intake system. In 2009-2011 Ford Focus service applications, this filter provides a straightforward replacement option for routine maintenance. This part cross-references Monroe Shocks & Struts (e.g., 8S4Z9601A) for the same application.

What It Helps Address

• Restricted airflow caused by a dirty or loaded engine air filter
• Dust and road debris entering the intake system
• Reduced filtration performance from worn filter media
• Seal leakage around an aging air filter frame
• Routine maintenance needs on 2009-2011 Ford Focus vehicles

Installation Notes

Verify the vehicle year and engine air filter housing before installation. Replace the existing filter with the Bosch 5388WS panel filter and confirm the seal seats evenly in the air box. For best results, inspect the air cleaner housing for dirt, moisture, or damage before closing the cover. Fits 2009 Ford Focus, N/A. Fits 2010 Ford Focus, N/A. Fits 2011 Ford Focus, N/A.

Quality Assurance

Bosch designs this Workshop Air Filter with high pleat density, cellulose cured media, and a polyurethane seal to support filtration efficiency and intake protection in normal service conditions.