LONDON, England - The rear-wing problem that wrecked Fernando Alonso's hopes of winning the 2013 Bahrain F1 GP was a rare component failure within the drag reduction system (DRS).Ferrari said after an investigation: "It's the first problem of its kind on this system seen on the three years during which it has been used. The failure was not something to cause concern for the long term."TECHNICAL FAULTThe DRS is a driver-operated adjustable flap that can be opened to provide more speed for overtaking in certain designated zones on a circuit.Ferrari team principal Stefano Domenicali said Sunday's failure had prevented Alonso, who had been in second place, from chasing down Red Bull's eventual winner Sebastian Vettel for the victory.Alonso, who won the previous race in China, finished the Bahrain GP eighth. He is fourth overall in the Drivers' points standings but 30 points behind Vettel. Stay with Wheels24 for the 2013 Formula 1 season – fresh reports every day.