Lexus IS Engine and Cabin Air Filter Replacement | The mod EVERYONE should do! 

Did the new cabin air filter have arrows on one edge? Were they indicating which side goes up or were they indicating air flow? Air flow is down. So you put it in upside down. Toyota OEM filters tell you which side goes up. Most after market brands tell you air flow direction. Your new filter said air flow. Your air flow arrow should point down. The fact that dirt accumulates on top of the old filter proves that the dirty air comes in through the top of the filter. m.ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-sS3jMomdsKM.html