Buy 2003 Audi A4 Cabriolet Convertible 1.8L CVT FWD Cabin Air Filter. A4. A6/S6. Allroad. Cabriolet A4 - OEM Audi Part # 4B0819439C (4B0-819-439-C)

Cabin Air Filter. Dust Filter. Filter element.
Cabin Air Filter. From Chassis/VIN 4B-X-045 001. Odor & Pollen.

Cabin Air Filter

Fits A4, A6, allroad, RS4, RS6, S4, S6

A4. A6/S6. Allroad. Cabriolet A4, S4; w/Oder Filtration. S4, RS4. W/carbon.
Cabin Air Filter - Repair or Replace
If the air coming out of your vents smells a little funny—like mildew or funk—or if your windshield fogs up with the A/C on, your 2003 Audi A4 may have a clogged cabin filter. Many manufacturers recommend replacing the cabin filter, or pollen filter, as part of its scheduled maintenance.