Bosch P3857WS Workshop Cabin Air Filter

The Bosch P3857WS Workshop Cabin Air Filter is specifically engineered to ensure drivers and passengers breathe fresher, cleaner air by offering a 99% efficiency rate at 3 microns or greater in capturing dirt and other environmental particles from entering a vehicle's heating and air vents. This high-performance particulate cabin air filter is designed to replace your factory filter and provide superior air quality inside your vehicle's cabin.

Advanced Multi-Layer Filtration Technology:

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

Key Features:

• Captures up to 99% of dirt and other environmental particles over 3 microns, and up to 80% of particles under 3 microns
• High pleat count provides greater surface area for higher filtration capacity
• Designed and tested to meet High Efficiency Particulate Air (HEPA) standards based on test standard ASTM D2986, providing ultimate protection in trapping allergens, dust and other particulates
• OEM part number 30630752 cross-reference
• Alternate Bosch part number F00E369732

Cabin filters should be inspected at least once a year, however Bosch recommends following replacement at manufacturer-specified intervals, though if you drive in heavy traffic you may want to replace your filter more often. Signs that you may need a new cabin air filter include reduced air flow through your HVAC system or noise coming from the fan.