McLaren must change their diffuser before the Australian GP, according to Auto Motor und Sport.
The FIA has informed the Woking based squad that the current diffuser has exploited the rules, by enlarging the hole used for the external engine starter, therefore gaining another diffuser level.
The rules surrounding the diffuser will be tightened up before the Australian GP to avoid anymore controversy after last years uproar which plagued the opening few races.
McLaren have intentionally kept quiet on the issue, immediately agreeing to scrap the diffuser before the next round of the championship.
