Radar dome sent cars 'haywire'.
In February it emerged that a flurry of motorists had experienced their electrics cutting out as they drove past the dome at Trimingham in Norfolk.
At the time, the MoD said the radar was operating legally and there was no guarantee it was the cause of the incidents.
But an MoD spokeswoman has said that an inquiry had revealed the Type 93 radar spinning inside the dome had been "out of alignment" between November last year and this February.
She said the fault was down to "unserviceable phase shifters and drop in wave guide air pressure", but the spokeswoman could not explain further.
The spokeswoman stressed that although there was no danger to the public or personnel, it would now consider outstanding compensation claims on a case-by-case basis.
Neil Crayford, who runs the nearest garage, Crayford & Abbs at Mundesley, dealt with 30 calls over a couple of months.
He said yesterday the problem was still happening. "We have had a Nissan Terrano in here three or four times in the past week with the same sort of problems - dials going haywire and blacking out, which we had to reset."
But the MoD said last night: "There is no known recurrence of the problems experienced last year."