This is one of those things that people should be aware of BEFORE buying a particular car - perhaps there is a website for it already but if not there should be.
In the early 1970`s, I bought a new BMW and in the time I had it, twice I had to buy a new plastic bottle for the windscreen ******* in order to pass the MOT. I was totally disgusted with the price they charged and vowed never to have another BMW. Of course this is not something anyone would even think of before buying a new car - or even a used one, but it would be handy to know.