How often should the air filter be changed in a BMW 4 Series?

I recently bought a used BMW 4 Series and was wondering how often I should replace the air filter to maintain optimal engine performance?

It is recommended to change the air filter every 15,000 miles or once a year, whichever comes first. This will help prevent any buildup of dirt and debris in the engine.

If you frequently drive in dusty or dirty conditions, it is best to change the air filter every 10,000 miles. Keep an eye on your car's performance and inspect the air filter regularly for any signs of excessive buildup.

Another factor to consider is the type of air filter your BMW 4 Series has. A paper air filter typically needs to be replaced more frequently than a reusable one. Refer to your owner's manual for specific recommendations.