FILE PHOTO: Formula One - F1 - Test session - Barcelona-Catalunya racetrack in Montmelo, Spain - 27/2/17. Renault's Nico Hulkenberg in action. REUTERS/Albert Gea/File Photo
MELBOURNE (Reuters) - Renault said they have fixed their pre-season power unit problems with a "belt and braces" approach ahead of Formula One's Australian Grand Prix opener.
Issues with the unit's Energy Recovery System (ERS) limited the team's mileage in the second Barcelona test this month, although the car was clearly a significant step up on last year's.
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