I would guess that the fruit belonged to an animal. They love to put **** under the hoods of cars. Squirrels and chipmunks seem to like using air cleaner housings as nut storage.
I found a bunch of deposit slips and other bank papers in my truck, along with a pack of gum, hair clips, and a Babys-R-Us receipt.
The only present that came in my parents' 2002 Ranger they bought new was some extra carpet stuffed behind one of the jump seats.