Cyril Abiteboul has apologised on behalf of Renault to Max Verstappen following his latest retirement at the Belgian Grand Prix.
Verstappen has been forced to retire in six of 12 races so far this season and is getting increasingly frustrated with the reliability issues that are preventing him from being in the mix for podium spots this campaign.
Red Bull boss Christian Horner has since criticised Renault for providing a "below-par service" and the Enstone-based team are sorry for Verstappen's latest setback.
"An electronic systems issue seems to be at the heart of this problem," Abiteboul said.
"I personally apologise to Red Bull Racing, and more specifically to Max and his many fans who are as disappointed as we are.
"We will work closely with RBR to define a course of action and a roadmap to eradicate issues such as this one which meant they couldn't harness their package's potential."
To make matters worse, Verstappen is set for a grid penalty at the Italian Grand Prix this weekend due to the sheer amount of power components he has had to go through this season.