The DNA air filter is a high-flow filter designed to fit in the factory airbox of the Smart City Coupe. It is washable and reusable, and is designed to increase horsepower and acceleration while still providing filtration.
- Type: High-flow air filter
- Fitment: Smart City Coupe 0.6L 450 98–04
- Installation: In the factory airbox
- Reusable: Yes
- Washable: Yes