Learn Swedish: Det finns gott om plats i bilen. - There is plenty of room in the car.

The phrase gott om is a fixed expression in Swedish meaning 'plenty of' or 'an abundance of.' It always stays in this exact form, gott om, regardless of whether the noun that follows is uncountable, like plats, or a plural countable noun, like bilar (cars).

Doesn't plats normally mean a 'place' or a 'seat'?

Yes, as a countable noun, en plats means a specific place or a seat. However, when used as an uncountable noun like in this sentence, plats translates to physical 'space' or 'room'. Because we are talking about space in general here, it doesn't take an article.

Why use Det finns instead of Det är for 'There is'?

When stating that something exists or is physically available ('there is' or 'there are'), Swedish uses Det finns. While B2 learners usually know this, it is still easy to accidentally slip into using Det är because of English habit. Save Det är for when you are identifying what a specific thing is.

Why do we use the preposition i (in) for the car, but på (on) for many other vehicles?