Replaceable doesn't mean cargo though. You don't consider the wheels on a car part of its cargo.

I don't consider a remote control toy a vehicle for the same reasons stated in my previous post.

Anyway, the term is most definitely not an exclusively American one, even though it may find more use in the Americas than in other English speaking countries. Though a few random google searches seems to indicate that the word "vehicle" is used similarly in the UK and Australia as it is in the US and Canada.