(Image credit: kaeferblog.com)

Jettas, Beetles, Passats and…hot dogs? Since the 1970s, Volkswagen has been producing currywurst at its Wolfsburg plant butchery in Germany.

Currywurst is a type of pork sausage that is popular in Germany as a fast food item. It's served with a sauce made from ketchup or tomato paste and curry powder.

VW buys the meat for its currywurst from German farmers and uses it in its secret recipe.

In 2011, 4.8 million VW currywursts were sold.

Originally the product was only available to employees and visitors of the VW theme park in Germany, Autostadt. Now, the company has made the hot dogs available at a museum dedicated to currywurst - the Deutsches Currywurst Museum Berlin.

(Image credit: kaeferblog.com)

In the late 1990s, VW worked with a specialist from Kraft to create a ketchup line. The demand for the ketchup grew and the company went from producing 20,000 bottles to 425,000 bottles per year.