I have had a K and N filter for 10 years and almost 300k miles never had any issues very easy to clean and saved me a lot of money heres how to put one in https://www.youtube.com/watch?v=vqBPCNF8zzU
I had the same issue with my cock and its an easy fix watch this to remove the clock https://www.youtube.com/watch?v=noQW_Vp5AS8 then just add some sodder to the resisters and it should be good as new sorry i don't have a video for soldering but do a you tube search it was simple.
2003 le
I have been driving very conservatively and am getting 38-40 all around. worst i have ever had was 33 all city driving thats in almost 300k miles.