My friends A3 tdi 130 sport has blown a turbo. He'd bought one of those tuning boxes second hand, had it fitted for an hour or so and blew the turbo on the motorway. He was giving it some stick but ive never heard of this before even with remaps that produce more power than a tuning box. does anybody have any theorys as to why the turbo gave up, maybe it was a bit dodgy anyway. itd only done 65k though. Thanks.