Red Bull head into Sunday's Saudi Arabian Grand Prix confident there will be no repeat of the gremlins that put both their cars out of the season-opener in Bahrain, the team's Mexican driver Sergio Perez said on Thursday.
The 32-year-old and his world champion team mate Max Verstappen, who was on course for second having engaged Ferrari-winner Charles Leclerc in a race-long battle for the lead, both retired in the closing stages of last Sunday's Sakhir race.
Speaking after the race, Red Bull team boss Christian Horner did not elaborate on the cause of the problem.
Perez said it stemmed from a standard-issue part but Red Bull's fuel system had not worked as expected.