Christian Horner says problems at the factory caused Red Bull’s early-season problems in 2017.
The former champions are now getting closer to title protagonists Mercedes and Ferrari, but only after a hard push to identify the problem and close the gap.
“The race track didn’t show what our tools had promised,” team boss Horner told Auto Motor und Sport.
“It put us back two months, but then you have to work twice as fast as the others because they’re not standing still.