BMW has released pictures of the M3 convertible, the third variant in its 3 Series performance range.
Powered by the same 414bhp 4.0-litre engine as the saloon and coupe, the car's body structure has been reinforced to reduce flexing, and the suspension modified to ensure handling remains sharp.
The hard-top roof and its folding mechanism increase the car's weight by 135kg over the coupe, giving the car a total weight of 1790kg.
That reduces performance slightly, with the 0-62mph time now 5.3sec, 0.4sec slower than the coupe. The average fuel consumption also falls from 22.8mph to 21.0 mpg.
The car also features an air-conditioning system that takes the outside temperature into account when the roof is down.
No prices have been revealed, but it is expected to cost from 54,000.
The M3 Convertible will go on sale late this year, while the M3 saloon goes on sale in March priced at 49,210. The coupe is already on sale, costing 50,625.