The pressure is on Renault to resolve their engine issues with rumours suggesting Red Bull are seeking a new engine supplier for 2015.
Although with Renault power Red Bull have won four successive Drivers' and Constructors' titles, the reigning Champs are reportedly considering another engine manufacturer for next year's Championship.
According to former F1 team boss Giancarlo Minardi "it is rumoured that Red Bull are thinking about changing their engine supplier in 2015."
Renault are adamant a solution to the engine woes that kept Red Bull down to just 21 laps at Jerez is on the horizons.
Minardi, however, reckons it is more dire they are making out.
"Despite Renault, Red Bull and Toro Rosso are putting a lot of effort into injecting calm and tranquillity to the audience by issuing comforting press releases and giving reassuring interviews, the situation seems to be more complicated than expected and it's not easy to solve it," he said.
"As far as engine is concerned, according to some information coming from abroad, Renault is trying to hire technicians beyond the transalpine borders (without success). This has never happened before, as the French company has always tried to protect its technology.
"News like that fuel some doubts about possible engine structural issues, which seem to be not so easy to solve over the short term.
"Some manufacturers, who are currently not engaged in the F1 Championship, have a personal unit already made and are taking into account the possibility to join the top series, even if they're having some troubles finding an important partner to go into partnership with, unless they are capable to exploit Renault's current failure.
"Obviously I hope to be belied in few weeks, during the second pre-season test session in Bahrain, where teams and engine manufactures will bring their technical amendments.
"This is a very messy moment for Formula 1."
Red Bull advisor Helmut Marko responded to Minardi's claims, saying Red Bull have a "long-term contract with Renault".
He did, however, add that is "of course linked to performance."