On four-cylinder BPY and five-cylinder engines, the air filter is incorporated in the engine cover. For the four-cylinder timing belt engine (BPY), start by releasing the intake hose clamps at the rear of the engine cover and disconnecting the intake hose from the Mass Air Flow (MAF) sensor, followed by disconnecting the MAF sensor electrical connector. Next, remove the fresh air intake air duct mounting screws at the front of the engine cover, lift the engine cover up from the right side of the ballstuds, then the left side, and remove it. Place the cover upside down on a bench to remove the filter housing mounting screws, rotate the housing up to unhook it from the engine cover, and then remove the filter from the housing. Clean the inside of the air filter housing with a damp cloth, and installation is the reverse of removal. For four-cylinder timing chain engines (CBFA and CCTA), lift the engine cover up and off of the ballstuds, release the air guide top cover clips to remove the top cover, then release the air guide lower clips to remove the guide. Remove the fasteners securing the cover of the filter housing, detach the smaller hose from the front of the filter housing if equipped, lift the cover up to remove the air filter element, clean the inside of the air filter housing with a damp cloth, and installation is the reverse of removal. For five-cylinder engines, release the intake hose clamp from the engine cover and disconnect the intake hose, then disconnect the MAF sensor electrical connector and detach the smaller hose from the front of the filter housing if equipped. Remove the fresh air intake air duct mounting screws at the front of the engine cover, lift the cover up from the right side off of the ballstuds, then the left side, and remove it. Place the cover upside down on a bench to remove the filter housing mounting fasteners, rotate the housing up to unhook it from the engine cover, and then remove the filter from the housing. Clean the inside of the air filter housing with a damp cloth, and installation is the reverse of removal.