Bosch 5521WS Workshop Engine Air Filter

The Bosch 5521WS Workshop Engine Air Filter delivers professional-grade filtration performance designed to protect your engine from harmful contaminants. This filter offers 98% filtration efficiency, ensuring clean air enters your engine for optimal performance and longevity.

Key Features:

• Constructed with a high number of pleats for superior dust-holding capacity
• Built with cellulose cured media that stands up against dust, dirt, and other contaminants
• Processed with a polyurethane foam seal that provides elasticity and sealing efficiency while safeguarding against heat and water
• Non-oiled dry filter design protects mass air flow sensors
• Panel-style filter with white paper media

Bosch Workshop Air Filters are designed specifically for the professional installer market, offering 90% vehicle coverage to ensure you always have the right filter for the job. The advanced pleated design maximizes surface area for enhanced airflow while maintaining exceptional filtration performance. By preventing dirt and debris from entering your engine, this filter helps maintain fuel efficiency, reduce engine wear, and ensure reliable starting in all weather conditions.