Daniel Ricciardo was left scratching his head when his RB11 simply cut out as he vyed for position with Sergio Perez at the Belgian Grand Prix on Sunday.
The Australian was behind the Force India going into the Bus Stop chicane before he lost all power, forcing him out of what looked like a podium finish behind the two Mercedes cars.
“I had a good start. jumping up to third and the race was going okay,” he said.
“It’s disappointing not to finish, we are not sure what the issue is but the team are investigating.
“I lost power going into the chicane, everything switched off, including the dash.
“It looks like it’s electrical but we’ll see what the investigation brings.”
His retirement - the second in three races - twinned with team-mate Daniil Kvyat’s fourth place means Ricciardo slips behind the Russian in the Championship standings.