I recommend once per year replacing both your engine and cabin air filters. I couple that with the windshield wipers just to stay with a regular annual schedule. In this video I will show you how to do this yourself in less than 5 minutes and save alot of money from having it done at the dealership!
Here is the link to the engine air filter - https://amzn.to/3q8Rbtn
Here is the link to the cabin air filter - https://amzn.to/3MZkBTL