hi guys. i would like to know where can i get a full list of car
models for the past lets say 25 years or more just like on
autotrader.com or cars.com. i would like to add dropdowns for people
on my website where they can choose a year then manufacturer then
model of the car/suv/truck and so on. for example 1995 bmw 325is. does
anyone provide that type of list and keeps it up-to-date (b/c new cars
come out every year).

In the UK that sort of stuff is kept by the AIB
(Association of Insurance Brokers)

If you are not selling insurance, then I'll bet that there is a USA
equivalent of the AIB - and one of the online insurers would bite your
hand off to get your clients ... and give you the file

i didnt know its such a difficult question :-) . i figured someone
online keeps a database of those items and u constanly check for
updates.