Red Bull Racing remain in the dark as to why Sebastian Vettel suffered several reliability issues during last weekend's Australian GP.
Vettel was unable to challenge at the front during Saturday's qualifying due to an engine software issue and lined up 12th on the grid.
His problems, though, went from bad to worse on Sunday when his Renault engine dropped a cylinder, putting the reigning World Champ out of the race.
But why Vettel's RB10 was the sole Red Bull hit with problems remains a mystery to team boss Christian Horner.
"It looks like it dropped a cylinder for whatever reason, and we need to understand exactly what has caused that - whether that is through electrical or software...
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