has confirmed that yet another alternator failure caused Sebastian Vettel
to retire from Sunday's Italian grand prix. Having lost his charge for victory in Valencia earlier this year with the same problem, the issue resurfaced at Monza on Saturday when the reigning world champion broke down in practice.
It struck again on Sunday; a big blow to the German's championship hopes.
"It has to be corrected quickly," team boss Horner told the German broadcaster Sky.
After the practice problem, alternator supplier Renault
apologised to Red Bull.
"Today it cost us a lot of points," Horner said on Sunday. "We have to move forward with it urgently if we are to continue for the title."
With Mark Webber
also retiring in Italy, is is defending champions Red Bull's first double non-points finish since Korea 2010.
Earlier at Monza, Vettel was penalised by the stewards for forcing his championshp rival Fernando Alonso
wide at the Curva Grande.
Last year, it was Alonso who pushed Vettel wide at the very same corner.
"It looked quite the same as a year ago," Horner said. "I thought it was a normal racing incident, with Sebastian in front and taking his line. "It was very surprising that we were punished for it," he insisted. (GMM)