Genuine BMW Air Filter 

Part number is 13717536006. 

Fits

1Series  E81 E87  E87 LCI  E88  E82 

3Series  E90  E90 LCI  E91  E91 LCI E92  E92 LCI  E93  E93 LCI 

X1 E84 

**** If you are unsure of the application please e-mail me your VIN ****