

The BMC FB421/01 is a washable, reusable replacement panel air filter designed for select BMW E60/E61 5 Series and E63/E64 6 Series applications.
Designed to replace the factory air filter on compatible applications where BMC FB421/01 is specified.
This BMC filter can be cleaned and re-oiled with the proper BMC cleaning kit instead of being discarded like a standard paper filter.
BMC’s oiled cotton gauze design supports improved airflow while maintaining filtration for performance-focused applications.
Use the table below to help confirm whether this BMC air filter matches your vehicle, engine, and application.
| Year Range | Make | Model | Engine | Trim / Notes | BMC Part No. | OEM Cross Reference |
|---|---|---|---|---|---|---|
| 2007-2010 | BMW | 5 Series E60/E61 | 520i gasoline | 170 hp; confirm OEM cross reference before ordering | FB421/01 | 13717521023, 1371752103701, 13717521037 |
| 2005-2010 | BMW | 5 Series E60/E61 | 540i gasoline | 306 hp; confirm body style and OEM cross reference before ordering | FB421/01 | 13717521023, 1371752103701, 13717521037 |
| 2003-2005 | BMW | 5 Series E60/E61 | 545i gasoline | 333 hp; confirm body style and OEM cross reference before ordering | FB421/01 | 13717521023, 1371752103701, 13717521037 |
| 2005-2010 | BMW | 5 Series E60/E61 | 550i gasoline | 367 hp; confirm body style and OEM cross reference before ordering | FB421/01 | 13717521023, 1371752103701, 13717521037 |
| 2003-2005 | BMW | 6 Series E63/E64 | 645Ci gasoline | 333 hp; confirm OEM cross reference before ordering | FB421/01 | 13717521023, 1371752103701, 13717521037 |
| 2005-2011 | BMW | 6 Series E63/E64 | 650Ci gasoline | 367 hp; confirm OEM cross reference before ordering | FB421/01 | 13717521023, 1371752103701, 13717521037 |
| Platform | BMW E60/E61 5 Series and E63/E64 6 Series applications |
|---|---|
| Engine Notes | Compatible applications include select BMW gasoline models including 520i, 540i, 545i, 550i, 645Ci, and 650Ci applications where BMC FB421/01 is specified. |
| BMC Part Number | FB421/01 |
| OEM Cross References | 13717521023, 1371752103701, 13717521037 |
BMC replacement filters are built for drivers and riders who want reusable performance filtration while keeping an OEM-style airbox fitment.
The FB421/01 is designed for compatible applications where this BMC part number is specified. It is a smart choice for enthusiasts, shops, and installers looking for a washable replacement filter without converting to a full intake system.
BMC filters are washable and reusable when serviced correctly. Use the proper BMC cleaning kit, allow the filter to dry fully, and avoid over-oiling before reinstalling it.
Contact European Performance Filters before ordering. We can help verify the correct BMC part number using your vehicle details, model, engine, and production information.
Yes. BMC FB421/01 is designed as an OEM-style replacement filter for compatible applications where this BMC part number is specified.
No ECU tuning is required. FB421/01 is designed as a direct replacement panel filter for compatible applications.
Yes. BMC FB421/01 is washable and reusable when cleaned, dried, and re-oiled correctly with the proper BMC cleaning kit.
FB421/01 is designed for select BMW E60/E61 5 Series and E63/E64 6 Series applications where this BMC part number is specified. Always confirm your vehicle details and airbox configuration before ordering.