I was having bad idle problems, car would idle below 1k rpm's and a check engine light would come on. Went to my local Toyota dealership and had them run a diagnostic test/ came up with a bad MAF sensor. I bought the LEXUS AFM from Suprastore and after having it on, my car is still idling rough. Is it the SENSOR that I need to replace or what? If so, this part will cost me quite a bit of money right? Any shortcuts or new ideas for me? Thankx Fellas.