I had purchased a NTK 24300 LAF online some time ago; but didn't get around to installing it until last night. When I received it I was concerned since the LAF itself was NOT marked L1H1. Instead the barrel of the sensor is stamped NTK JAPAN and one flat surface of the hexagonal portion is stamped 5XW5. Good news is with the new LAF installed, the car drives fine with no CEL. It feels smoother, no stumbling, possibly with a little less power on the highway. Fingers crossed, hoping my FE is improved. I'll report my results on the next fill-up.