I was going to order a replace set, but am I wasting money. Air filter were replaced 13 months ago at 43448 miles, and the cabin filter was done 25 months ago on 32890 miles. Millage is now at 52k. Not sure sure what the 'Mann Frecious Plus cabin filter' is much better than the standard? but we both have summer allergies and wonder if this would help? I can get three filter for £75.