Six people died in the bombing when the train passed a tunnel close to Edgware Road station on July 7th 2005. It was one of four attacks on Tube trains and a bus that killed 52.
The repairs will cost about £9 million and the train is due to go back into service in May 2008. One of the survivors of the attack is upset about this decision and told Heart FM she would never get back on those trains.
A London Underground spokesperson said: "None of the Tube carriages in which the bombs exploded will be used again in passenger service. They have been scrapped and disposed of securely. Other carriages and parts will be brought back into use."
An industry source added: "They will be virtually new carriages. In an ideal world this train would also have been scrapped but they don't make them like this any more and we desperately need the stock back. We cancel on average six trains a day on the Circle and Hammersmith & City lines and need every train possible."