Renault were unable to capitalise on a chaotic Azerbaijan GP with both Jolyon Palmer and Nico Hulkenberg retiring on Sunday.
Palmer had a wretched weekend around the streets of Baku and was unable to take part in qualifying after a fire in final practice damaged his RS17.
His Sunday wasn't any better as his race ended on lap 7 with an ignition problem.
However, that wasn't the end of Renault's woes as Nico Hulkenberg later retired when he crashed.
"On a day like this, a double DNF is the worst that can happen to the team both in terms of race results and in terms of championship position," said Renault chief Cyril Abiteboul.
"We need to understand and immediately address the technical issues that prevented Jolyon to even participate, and Nico to start higher in the grid this weekend.
"We saw a highly unusual and eventful grand prix and we will do all we can to make sure that this will be our only double DNF of the season."
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