Key keywords: Kimi Antonelli, Mercedes F1 Junior Team, 2024 Formula 2 Championship, Italian Grand Prix F2, powertrain fuel pump failure, F2 title race, Mercedes junior driver development, F1 promotion prospect Mercedes’ official motorsport engineering team has published the full investigation result into Kimi Antonelli’s unexpected retirement from the 2024 Italian Grand Prix Formula 2 feature race last weekend, confirming the issue stemmed from an internal powertrain defect rather than driver error. The 18-year-old Italian Mercedes junior, who entered the Monza round just 3 points behind championship leader Isack Hadjar, had secured pole position in qualifying and led the first 17 laps of the 30-lap feature race on his home circuit, on track to pick up a maximum 25 points plus additional fastest lap points that would have put him firmly in the championship lead with two rounds remaining. However, he was forced to pull into the pits and retire on lap 18 after reporting a sudden loss of power, dropping him to 22 points behind Hadjar in the standings and putting his 2024 F2 title bid at serious risk. Mercedes’ trackside F2 engineering director Andrew Shovlin confirmed in a press briefing on Wednesday that post-race teardown of Antonelli’s powertrain identified a faulty high-pressure fuel pump as the cause of the failure. “We ran a full component-level failure analysis over the past 72 hours, and confirmed the pump had a manufacturing defect from our supplier’s latest batch, which caused a sudden pressure drop that cut off fuel supply to the internal combustion engine mid-race. There was no warning sign prior to the failure, and Kimi’s operation of the car was completely perfect throughout the session. We take full responsibility for this error that has damaged his title chances.” The team also confirmed that they have completed full inspections of all powertrain components allocated to Antonelli for the remaining two rounds in Yas Marina, and have replaced all fuel pumps from the same defective batch to eliminate repeat risks. Antonelli, who was visibly distraught after the Monza retirement, stated that he was relieved to confirm the issue was not related to his driving, and that he will focus on maximizing points in the final 4 races of the season to close the gap to Hadjar. Motorsport analysts note that Antonelli remains the favorite to secure a Mercedes F1 race seat for 2025 regardless of the F2 title result, but a championship win would cement his status as one of the most promising young drivers in the sport’s history.