Daniel Ricciardo has been forced to take on a new turbocharger for this weekend's Brazilian Grand Prix and will therefore start five places lower than he qualifies thanks to a grid penalty.
However the cause of the turbo failure was not down to reliability, but a marshal error according to Red Bull team boss Christian Horner.
Ricciardo was forced to stop his car during the Mexican race and, although it wasn't on fire, smoke was seen coming from the engine which resulted in a marshal pulling out his fire extinguisher where he proceeded to douse the car.
According to Horner, the extinguisher foam was sprayed inside the exhaust where it solidified inside the turbo, causing it to fail.
"You can't really blame them [the marshal] as the car was obviously smoking but they shot foam up the exhaust and as it solidifies in the turbo it terminated it," he explained.
"He'll take a five-place penalty but hopefully on a track like this it is not actually that big of a penalty."
Horner also revealed that Max Verstappen was lucky to finish in Mexico let alone win the race after it's believed his oil tower broke during the final laps, an issue that was only discovered during FP1, which meant the Dutchman missed out on half of the second session as his crew worked to replace it.
"The oil tower in the engine developed a crack so it started to leak oil in that last session. It had to be changed but the guys have done a great job at getting the engine off the back of the car and back on to get it apart.
"The lucky thing really, I was just talking to Paul Monaghan about it, we suspected that crack may have started in Mexico because there was a little bit of oil loss that couldn’t be accounted for. So actually it is probably a little lucky it got to the end of the race."
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