Which fallacy does this argument commit? 'Ambassador cars are almost extinct. This is an Ambassador car. Therefore this car is almost extinct.'

The argument commits the fallacy of division.

"Almost extinct" is true of the class of Ambassador cars taken as a whole.

This class-level property is then pinned on one single Ambassador car.

Being rare as a group says nothing about any one individual member.

Transferring a trait of the whole class to its individual part is unwarranted.

This downward shift from the class to a member is the fallacy of division.