Bosch P3681WS Workshop Cabin Air Filter for Select BMW Models

The Bosch P3681WS Workshop Cabin Air Filter is a precision-engineered replacement cabin air filter (also known as a passenger compartment air filter or pollen filter) designed to deliver clean, fresh air inside your vehicle's cabin. Cross-references OEM part number 64119069895.

Cabin air filters clean the air that enters your vehicle through the heating, ventilation, and air-conditioning (HVAC) system, blocking airborne contaminants before they reach passengers. Bosch recommends inspecting your cabin air filter at least once per year, or more frequently in heavy-traffic driving conditions.

Key Features:

• Multi-Layer Filter Media – A layered construction including a non-woven pre-filter layer to capture larger particles, an electrostatically charged microfiber layer to attract and hold fine particles, and non-woven cover layers for added stability and protection
• High Filtration Efficiency – Offers up to 99% efficiency at 3 microns or greater, capturing dust, dirt, pollen, and other environmental contaminants from entering your vehicle's heating and air vents
• High Pleat Count – Provides greater surface area for increased filtration capacity and airflow
• OE-Quality Fit – Engineered as a direct-fit replacement with the precision of an original equipment part; foam perimeter gasket included where specified by OE to prevent particles from bypassing the filter media
• Cross-Reference Numbers – Replaces OEM part 64119069895; also referenced as P3681WS-INT

Signs that your cabin air filter may need replacement include reduced airflow through your HVAC system or unusual noise coming from the blower fan. Replace at manufacturer-specified intervals to maintain peak interior air quality and protect downstream HVAC components.