Bosch C3871WS Cabin Air Filter

Bosch Cabin Filter for Cleaner Interior Air

The Bosch C3871WS cabin air filter uses activated carbon and a 5-layer design to help reduce odors and filter airborne contaminants entering the HVAC system. It is built as an OEM standard part for select Buick, Cadillac, Pontiac, and Oldsmobile applications, including Buick Lucerne, Cadillac DTS, Buick LeSabre, Cadillac DeVille, Pontiac Bonneville, and Oldsmobile Aurora.

Key Features

• Activated charcoal filter media for odor reduction
• 5-layer construction with an added carbon layer and protective cover layer
• OEM standard part for factory-style cabin filtration
• HEPA filter: No
• Recommended replacement interval: 12,000 miles
• Previously cataloged as Bosch C3871

Product Details

Bosch Cabin Filter, Activated Carbon line focuses on cabin air filtration with layered media that captures dust and helps absorb gases and odors such as ozone, nitrogen oxide, sulfur dioxide, and hydrocarbons. The Bosch C3871WS is a charcoal cabin filter designed for vehicles that use a standard HVAC filter location and need a direct replacement for routine maintenance. It is a practical choice for drivers searching for a cabin air filter for 2006-2011 Buick Lucerne, a cabin air filter for 2006-2011 Cadillac DTS, or a replacement cabin filter for 2000-2005 Pontiac Bonneville and related GM platforms.

What This Filter Helps Address

• Unwanted odors entering the cabin through the HVAC system
• Reduced air freshness from a loaded or dirty cabin filter
• Dust and airborne debris circulating through the interior vents
• Factory filter replacement needs during scheduled maintenance
• Cabin air quality concerns in daily driving and stop-and-go traffic

Installation Notes and Tips

Replace the cabin filter at the vehicle’s service interval or sooner if airflow drops or odors increase. Confirm the vehicle uses the cabin filter location specified for the application before ordering. For fitment, this part is listed for 2006-2011 Buick Lucerne, 2006-2011 Cadillac DTS, 2000-2005 Buick LeSabre, 2000-2005 Cadillac DeVille, 2000-2005 Pontiac Bonneville, and 2001-2003 Oldsmobile Aurora. The Bosch C3871WS should be installed according to the vehicle’s HVAC filter access procedure.

Quality Assurance

Bosch manufactures this cabin air filter as an OEM standard replacement part with activated carbon media and multi-layer filtration. This part cross-references Bosch C3871 for the same application.