Christian Horner has slammed Renault for “unacceptable” reliability and performance after a disappointing Austrian Grand Prix.
Red Bull's home race saw Sebastian Vettel retire with an electrical issue having failed to get out of Q2 in qualifying, while Daniel Ricciardo was limited to eighth place having won in Canada a fortnight before. With the Mercedes power unit dominant in Austria, Horner said the job Renault has done is not good enough and called for changes at the engine manufacturer.
“It's frustrating that we're in the situation that we are,” Horner said. “We've obviously had a lot of success with Renault. We've won all the races and all the championships that we've achieved with Renault power. But the situation just isn't improving at the moment.
“The reliability is unacceptable. The performance is unacceptable. There needs to be change at Renault. It can't continue like this. It's not good for Renault and it's not good for Red Bull.
“We need to work together as partners. There will not be another engine in the back of the car next year, but we want to be competitive and we want to run at the front.”
On specific changes, Horner wouldn't elaborate on what he would like to see implemented by Renault.
“Something needs to happen because whatever's being done there at the moment isn't working. It's not our business, it's not our responsibility. We're the end user and it's just frustrating that it's not where it needs to be at the moment.”
Asked if there should be a personnel change, Horner replied: “That's a Renault issue.”