Bosch Cabin Air Filter P/N:P3877WS
Bosch C3740WS cabin air filter for the 1998-2001 Volkswagen Passat and other vehicles cleans dust, soot and odors out of the air entering the cabin. This Bosch cabin air filter pairs multi-layer media with an integrated activated carbon layer to work against odors.
Weak airflow from the vents or odors that linger in the cabin can mean the filter is clogged, though the blower motor or a blocked vent can be behind them too, so find the cause before replacing it.
The 1998-2001 Volkswagen Passat, the 2000-2002 Audi S4 and the 1996-2001 Audi A4 all take this filter, along with many other vehicles. The 1998-2001 Volkswagen Passat takes one. Own a different car? Run its year and model through the "Vehicles it fits" section.
Fit and size
Build and materials
Product information is for general reference and may contain errors. See our Disclaimer.
Will this Audi A4 cabin air filter suit a 1996-2001 A4?
Yes. Bosch C3740WS fits the 1996-2001 Audi A4, and the car takes one filter.
Can I use this as a VW Passat cabin air filter on a 1998-2001 model?
Yes. Bosch C3740WS fits the 1998-2001 Volkswagen Passat, with one filter per vehicle.
Is this a Bosch HEPA cabin air filter?
No. Bosch C3740WS is not a HEPA filter. It is an activated charcoal filter that traps over 98% of airborne dust, grime and soot.
Do Bosch car filters like this one have an activated carbon layer?
Yes. The C3740WS from Bosch has an integrated activated carbon layer that works against odors, exhaust fumes and industrial pollutants.
How often should this cabin air filter be replaced?
The recommended replacement interval for this filter is 12000 mi.
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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.