Bosch P3877WS Workshop Cabin Air Filter

The Bosch P3877WS Workshop Cabin Air Filter is engineered to provide superior air quality protection for your vehicle's HVAC system. This particulate cabin air filter features advanced multi-layer filtration technology that delivers a 99% efficiency rate at 3 microns or greater in capturing dirt, dust, and other environmental contaminants before they enter your vehicle's heating and air vents.

Advanced Three-Layer Filtration System:

• 1st Layer: Non-woven pre-filter captures larger contaminant particles
• 2nd Layer: Electrostatically charged microfiber layer attracts and holds smaller, more elusive particles
• 3rd Layer: Non-woven cover layer adds structural stability while protecting the microfiber layer and acting as an additional barrier against harmful elements

Premium Design Features:

• Mold-resistant multi-layer media for maximum performance and durability
• High pleat count provides greater surface area for enhanced filtration capacity
• Foam perimeter gasket prevents harmful particles from bypassing the filter media
• Injection-molded frame (where specified by OE) ensures stability for peak performance and extended service life

This Bosch Workshop Cabin Air Filter should be inspected at least annually, with replacement recommended following manufacturer-specified intervals. Signs that replacement may be needed include reduced airflow through your HVAC system or unusual fan noise. Cross-references to OEM part number F65Z19N619AB and alternate Bosch part number F00E369737.