BMW E39 525i 2001-2003 2.5L M54 EVO 3.5 PIPE

Questions and Answers

Q: Hello,is the air filter oiled or dry?
Asked by: Demian - 03/27/2025
A: The filter works like K&N which is washable and rechargeable. The filter it is not the must to be oiled; however, having it oiled for the best filtering result. We recommend to use the K&N cleaner kit and to do service every 10000miles (15000kms). Following with the K&N cleaner kit instruction you can easily do the service on filter. The cleaner it is easy to find from local parts shops. 
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Answer provided by:  Cosmo (03/27/2025)