Thanks for the info. It will be interesting to see if the new LAF sensor makes a difference. Then again, these maintenance items are like peeling an onion. I tried a LAF sensor from a car with 125K on mine which was at about 150K and it did not make a noticeable difference but a new sensor yielded better mileage and some improvement in lean burn. Granted, it is an 04 which uses a Denso system instead of the NTK setup in the earlier models. Good luck.Thanks for the reply Sean. This is very interesting! On my "good" Insight, I replaced the LAF sensor in December of 2010 with 75,689 miles on the odometer. I now have over 259,000 miles on the odometer, meaning my current LAF sensor has over 183,000 miles on it! While I'm needing an LAF sensor for my beater Insight, I'm tempted to now buy a new sensor for my good Insight and move my old one to the beater.