Bosch Cabin Air Filter P/N:C3870WS
Bosch P3740WS cabin air filter for the 1998-2001 Volkswagen Passat and other vehicles cleans the air the HVAC system blows into the cabin. This Bosch cabin air filter is a particulate type with one filter per listing.
Dusty or musty cabin air and weak airflow from the vents can mean the filter is clogged. The blower motor or the HVAC ducting can also be behind those signs, so find the cause before you replace it.
Vehicles it fits include the 1998-2001 Volkswagen Passat, the 2000-2002 Audi S4 and the 1996-2001 Audi A4, and each takes one filter. It is designed and tested as a direct OE replacement. If your car is not named here, look it up in the "Vehicles it fits" section.
Fit and size
Build and materials
One cabin air filter.
Product information is for general reference and may contain errors. See our Disclaimer.
Is the Bosch P3740WS an Audi A4 cabin air filter for 1996-2001 models?
Yes. The Bosch P3740WS fits the 1996-2001 Audi A4, and the car takes one filter.
Is this a VW Passat cabin air filter for the 1998-2001 Volkswagen Passat?
Yes. This Bosch P3740WS fits the 1998-2001 Volkswagen Passat. If your car is a different model, look for it in the "Vehicles it fits" section of this page.
Is this a Bosch HEPA cabin air filter?
No. It is a particulate cabin air filter with no HEPA filter and no activated carbon pre-filter for odor removal. Its multi-layer construction traps over 97.5% of dust particles 3 microns or larger.
Are Bosch car filters like this one tested as OE replacements?
Yes. Bosch cabin air filters are designed and tested as direct OE replacements, and this one has a high pleat count and structural ribs.
How often should I change this cabin air filter?
The recommended replacement interval for the Bosch P3740WS is 12,000 miles. Following your vehicle's maintenance schedule helps keep HVAC system efficiency up.
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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.