This previous thread may be helpful:
Something is made or was made in somewhere
In general I agree with Dombrefiel.
More specifically, we say "This car
is made in France" when we talking in general about a type of car, such as the Citroën. Citroëns are made in France.
If we are talking about a specific car, we use 'was'. If I was talking about my car with my neighbor, I might say:
"This car was made in France."
It's similar to Dombrefiel's example,
"This old gun was made in France, and is very rare." This is something you would say about a particular gun you were pointing to or had in your hands.
The other possibility, as Dombrefiel says, would be that you use 'was' to refer to a type of thing that used to be made in France but no longer is. For instance, you could point to a picture of a Bugatti and say
"This car was made in France from 1909 to 1963." In that case, you are making a general statement about a type of car, but using 'was' for the past.
The same general rules apply if you are talking about cheeses.