Bosch P3951WS Workshop Particulate Cabin Air Filter

The Bosch P3951WS Workshop Cabin Air Filter is engineered to deliver superior air quality protection for your vehicle's interior. This advanced particulate filter captures up to 99% of dirt and environmental particles over 3 microns, and up to 80% of particles under 3 microns, preventing harmful contaminants from entering through your HVAC system.

Advanced Three-Layer Filtration Technology:

• Non-woven pre-filter layer captures larger particles
• Electrostatically charged microfiber layer attracts and holds elusive smaller particles
• Non-woven cover layer adds stability to protect the microfiber layer from damage and acts as an additional barrier to harmful elements

Key Features:

• High pleat count provides greater surface area for higher filtration capacity
• Foam perimeter gasket prevents harmful particles from bypassing the filter media
• Designed and tested to meet High Efficiency Particulate Air (HEPA) standards based on test standard ASTM D2986
• Direct OE replacement for easy installation

Cabin filters should be inspected at least once a year; however, Bosch recommends following replacement at manufacturer-specified intervals. Signs that replacement may be needed include reduced airflow through your HVAC system or unusual noise from the blower fan. For vehicles driven in heavy traffic or dusty conditions, more frequent replacement may be beneficial.

This filter is compatible with select Ford and Lincoln vehicles. Cross-reference OEM part number DG9Z19N619D.