Image imported from illustraotr/photoshop gets pixelated after exporting to pdf or jpeg in corelraw

I use coreldraw for all my designing. I have to design some images for a Honda Dealer. The files available for download from Honda to use are in illustrator format. When i import them into coreldraw and export them for use in pdf or jpeg, only the images imported from AI get pixelated completely whereas the rest of the file is excellent. I have tried importing the ai file, psd file but the same issue. I exported the ai file to eps and then used it in coreldraw and i had good results. kindly help.