anyone know where i can get a intake for my car

i have 04 bmw 530

i been looking for one and cant seem to find one,

and also my rear right windows doesnt roll down or up in one motion, goes down a lil n stops and have to push the buttons few times in order make it roll down all the way down


and another probelm

my alarm keeps going off for no reason

it been doing this for few days, i lock the car from the remote, and like 2 hrs later the alarm goes off, onces in the middle of the night,

wondering if anybody had these probelms