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This High-Flow Air Filter (Ref. BM-1821) from K&N is washable and reusable, featuring state-of-the-art layered and oiled cotton media which has been engineered to improve airflow, capture contaminants and provide an increase in horsepower.
The reusable performance filter is engineered to last for the entire lifespan of your vehicle, and is backed by K&N's 10-Year/Million Mile Limited Warranty. The drop-in replacement filter is designed to install easily into your factory air box.
Upgrade today to start enjoying superior airflow and performance from K&N's most popular product!
To check specific compatibility you can use our Vehicle Lookup.
| Length [mm] | 227 |
| Width [mm] | 125 |
| Height [mm] | 21 |
| Filter type | Long-life Filter |
| Shape | Square |
| Air Filter Shape | Panel |
| Air Filter Material | Cotton Gauze |
| Washable | Yes |
| Height | 0.844 in (21 mm) |
| Outside Length | 8.938 in (227 mm) |
| Outside Width | 4.938 in (125 mm) |
| Package Contents | 1 Air Filter |
| Package Quantity | 1 |
| Warranty | 1,000,000 Miles/10 Year |
| Product Style | Panel Air Filter |
| Weight | 0.5 lb (0.2 kg) |
| Filter Re-Oiling Amount | 0.42 oz (12 ml) |
| Make | OE Number |
|---|---|
| BMW | 13718411061 |
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