The interior of any car consists of painted metal, plastics, man made fibers, glues and sealers. Most of these contain traces of the solvents used in their manufacture. All the plastics contain plasticizers. The solvents and plasticizers boil off forming an interesting and often rather nasty cocktail of organic compounds. The plasticizers continue to boil off throughout the life of the plasic components. It is the organic compounds that smell. Most cars use the same basic materials that contain the same components so the smell is the same.

I don't know, but I recently bought a spray tin of something which purported to be a "new car" fragrance and it wasn't even close so I suppose the "bottled fragrance" idea is not the answer.

The mix of solvents and plasticisers were replicated almost 15 years ago in a solvent spray that has been used by motor sales organisations ever since.  New cars have not needed much of a helping hand however used cars have been given a dose of the 'new car' fragrance to enhance the desirability of vehicles - the automative equivalent of coffee or baking bread in a house being offered for sale.

In all products, despite them being from different manufacturers, there is an element that is contained by them all. This is no exception in cars. All cars have a similar elemnt that makes them. this element makes them similar to each other despite the various manufacturing companies. And this is why all cars smell the same.Touring Motorcycle Exhausts