Daniil Kvyat says he 'trusts' Renault will get to the bottom of niggling power unit issues that hampered Red Bull's mileage during the first pre-season test.

Twelve months after each Renault-powered team suffered a dismal start to the 2014 season after being beset by engine-related technical issues, Red Bull's plans for 2015 still didn't get off to a great start having managed a relatively meagre 165 laps over four days - by contrast, main rivals Mercedes managed 515 laps.

Though part of the low mileage is explained by Kvyat damaging the team's sole front-wing on Monday, technical problems on Tuesday and Wednesday would limit running further.

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Nonetheless, the Russian - who joins Red Bull in 2015 from the sister Toro Rosso team - is convinced Renault sort its problems before the next test in Barcelona.

"Problems are always problems, you just have to sort them out. So this is not something that I can fix personally, we will keep working and everyone is supporting each other. I personally trust in Renault, I personally trust in Red Bull Racing and we will hopefully make good use of it."

"It's too early to make any conclusions from these days. There will be a lot of analysis going on and we will see. It's not easy to cut the deficit to zero in one clap of hands, so we just have to keep working hard. Only hard work, step-by-step and patience will bring us what we desire."

Though Red Bull suffered from problems, Toro Rosso by contrast endured a very productive test, notching up 351 laps with the same engine.