Red Bull is confident it has got to the bottom of its recent alternator problems.
The team has had several problems with the Magneti Marelli units supplied by engine partner Renault in 2012.
But Germany’s Auto Motor und Sport says Renault recently reverted to a 2011-specification alternator that helped Sebastian Vettel to reliably win the last Suzuka and Singapore grands prix.
"We are using a model now that has proved itself over two months," Red Bull’s Dr Helmut Marko is quoted by the German broadcaster RTL.