The Corteco 21651958 air filter is an activated carbon cabin filter for the 1995–1997 Audi A6 (4A, C4) 2.8 quattro. It is designed for vehicles with air conditioning.
- Type: Cabin filter
- Material: Activated carbon
- Length: 342 mm
- Width: 212 mm
- Height: 20 mm
- Weight: 0.209 kg
- Vehicle years: 1995–1997
- Compatibility: Audi A6 (4A, C4) 2.8 quattro
- Vehicle equipment: For vehicles with air conditioning