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The K&N Performance Air Filter KNN33-2417 is a direct drop-in replacement air filter for the Smart Fortwo and Fortwo Cabrio equipped with the 1.0L three-cylinder engine, providing improved airflow over the factory paper filter with K&N's signature oiled cotton gauze media for enhanced filtration efficiency across an extended service interval. The KNN33-2417 is engineered to match the exact dimensions of the factory Smart Fortwo air filter for a tool-free filter swap with no modifications required, and is rated by K&N for up to 75,000 miles between cleaning intervals for reduced maintenance cost over the life of the vehicle.
Key Features
- KNN33-2417 high-flow replacement air filter for Smart Fortwo 1.0L, direct drop-in fitment
- K&N oiled cotton gauze filtration media for improved airflow over factory paper filter
- 75,000-mile cleaning interval for reduced maintenance compared to disposable paper filters
- Washable and reusable design for long-term cost savings over repeated paper filter replacements
- Million-mile limited warranty from K&N Engineering
- OE drop-in shape and size for tool-free filter installation in the factory airbox
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2007-2015 | Smart | Fortwo | Brabus, Passion, Passion Cabrio, Pure |
Specifications
| Brand | K&N Engineering |
|---|---|
| Manufacturer Part Number | 33-2417 |
| Product Type | Air Filters - Drop In |
| Fitment Type | Vehicle Specific |
| Condition | New |
What's Included
One new K&N air filters - drop in identified by manufacturer part number 33-2417. Hardware, adapters, clamps, hoses, filters, and service supplies are included only when stated for this exact product.
About K&N Engineering
K&N develops reusable air filtration, intake, oil filtration, fuel filtration, and related performance products for vehicle-specific and dimensional applications.
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Frequently Asked Questions
How do I confirm K&N 33-2417 fits my vehicle?
Match the year, make, and model in the fitment table, then confirm the engine, factory housing, sensor layout, emissions notes, and any application restrictions stated for this exact part.
Is K&N 33-2417 washable and reusable?
Serviceability depends on the exact media used for this part number. Follow the K&N cleaning and oiling directions for this filter and never apply oil to media specified as dry.
What should be checked after installing K&N 33-2417?
Verify seals, clamps, fasteners, hoses, sensors, wiring, and surrounding clearance as applicable. Check for leaks or contact, then follow the manufacturer service and reinspection schedule.
Installation Instructions
- Allow the engine to cool before opening the airbox
- Open the factory airbox housing by releasing the clips or removing the retaining screws
- Remove and discard or retain the factory paper filter
- Drop in the KNN33-2417 K&N filter, ensuring it seats fully in the airbox housing
- Close and re-secure the airbox housing
- Reinstall any vacuum or breather lines disturbed during access
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