The new car's folding soft-top roof system was developed by Open Air Systems (Oasys), a joint venture between Webasto and Pininfarina that was founded two years ago. Oasys is based in Stockdorf, Germany, and Turin, Italy.
Now Pininfarina may also take over production of the car, which offers seating space for four passengers thanks to its compact folding roof system.
The Mini plant in Oxford, England, is already working close to its capacity of 180,000 units a year. BMW, owner of the Mini brand, expects to sell 160,000 Minis this year.
The Mini Cabriolet is due on sale in summer 2004.
From June 14, the Mini will also be available with a diesel engine supplied by Toyota.
Webasto already makes the roofing system for the BMW 3 series Cabriolet.