Bosch Cabin Air Filter P/N:C3870WS
Bosch P3876WS cabin air filter for the 2002-2009 Audi A4 and other vehicles traps dust particles from the air headed into the cabin. It is a particulate filter, not a HEPA filter.
Weak airflow from the vents, more dust inside the car or a stale smell can mean the filter is loaded with debris. These signs alone do not prove the filter is the problem, since a weak blower can cause weak airflow too.
Designed and tested as a direct OE replacement, this cabin air filter replacement covers the 2002-2009 Audi A4, the 2002-2009 Audi A4 Quattro, the 2004-2009 Audi S4 and other vehicles. Open the "Vehicles it fits" section to check your exact model and engine.
One cabin air filter. This listing holds a single filter, which matches the quantity the fitment calls for per vehicle.
Product information is for general reference and may contain errors. See our Disclaimer.
Is this the right air filter for a 2002-2009 Audi A4?
Yes. Bosch P3876WS fits the 2002-2009 Audi A4 and also the 2004-2009 Audi S4. Open the "Vehicles it fits" section to check your exact model and engine.
Is the Bosch P3876WS a HEPA cabin air filter?
No. The Bosch P3876WS is a particulate cabin air filter, and its HEPA filter flag is listed as No.
Is the P3876WS among the Bosch car filters with an activated carbon layer for odors?
No. This cabin air filter is listed without an activated carbon pre-filter for odor removal. It is a particulate filter.
How often should this cabin air filter be replaced?
The recommended replacement interval is 12000 mi. Following your vehicle's recommended maintenance schedule helps keep HVAC system efficiency up.
What is the filter media made of on the P3876WS?
The filter material is spunbound polyester along with synthetic meltblown fibers, in a multi-layer construction. Foam is the other listed material.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.