George Russell was forced to replace his power unit before the Hungarian Grand Prix when a crack in the engine triggered a water‑pressure loss during the qualifying session. The British driver had managed to secure a seventh‑place qualification, but a three‑place grid penalty for speeding handed him a sixth‑grid start, putting him ahead of his teammate Kimi Antonelli. The incident unfolded at the very end of Q3. As Russell completed his final flying lap, engineers detected a sudden drop in water pressure, prompting the driver to pull off the track.
The loss of pressure indicated a water leak, which the team traced back to a crack in the power unit. Because the replacement unit is of the same specification as the one it replaces, Russell will not incur a further grid penalty; the swap simply counts as his fourth power unit for the 2026 season, staying within the allotted limit. Mercedes engineers believe the leak originated when Russell’s car rode over the exit kerb at Turn 4 during his last qualifying effort.
The impact likely damaged a seal or a coolant line, allowing water to escape. "We lost water pressure and I had a water leak. When I stopped on track, the car was leaking a load of water," Russell told Sky Sports F1, adding that he hoped the issue would not affect his race performance.
He currently trails championship leader and teammate Kimi Antonelli by 50 points, making every point crucial. This is the latest in a string of reliability setbacks for the Mercedes squad.
Both Russell and Antonelli have suffered engine‑related retirements this season, and the British driver was left "lost for words" after the previous round in Belgium when a software bug in the power unit curtailed straight‑line speed and ultimately led to a race‑ending collision with Lewis Hamilton at Spa‑Francorchamps. Mercedes have since rectified the software issue, and the team is confident the fix will be in place for the Hungarian race. Technical director Simone Resta explained that the software problem was common to all the team's cars, but it impacted Russell more severely because Antonelli was running a fresher power unit. "When comparing their performance in the last few races, Kimi was on a fresher power unit, which is, of course, always a bit better than a used one.
That will change in the next races when we start to have a fresher power unit on George's side," Resta said. He added that the performance gap is a combination of software, hardware wear, and differing development programmes for the two drivers. The qualifying results placed Russell sixth on the grid, ahead of Antonelli, who will start seventh. Despite the advantage, Russell acknowledges that catching up to the leaders will be a challenge.
"We were probably even further on Friday but we had the strongest race pace, which tends to say it's not a car problem but a tyre problem," he noted, suggesting that tyre management may be the key factor rather than outright speed. Looking ahead to the race, Russell expressed uncertainty about his ability to fight for a podium place. "Time will tell in the race if we struck the right balance between the qualifying setup and race setup. We probably know we could make the car faster in qualifying trim at the expense of race performance.
It's going to be difficult to overtake. It would have been nice to be higher up," he said.
The Hungarian Grand Prix schedule is packed with support events, including an F3 feature race, a Porsche Supercup, and an F2 feature race, leading up to the main Formula 1 race at 2 pm local time. Sky Sports will broadcast the event live on its F1 channel and Main Event, with streaming available via NOW for subscribers who prefer an online feed. Mercedes will be hoping that the new power unit performs flawlessly and that the water‑leak issue does not recur under race conditions. The team’s recent reliability woes have cost valuable points, and a strong result in Budapest could help mitigate the damage to Russell’s championship campaign.
Meanwhile, Antonelli will be looking to capitalize on his own fresh power unit and continue his impressive rookie form. In summary, Russell’s forced engine swap highlights the fine margins in modern Formula 1, where a tiny crack can cascade into a grid‑penalty‑free unit change, a potential performance hit, and a strategic dilemma for the team. The Hungarian Grand Prix will be a crucial test of Mercedes’ ability to bounce back from technical setbacks and of Russell’s skill in extracting maximum performance from a car that has just undergone a major component replacement. Key qualifying positions: 1.
Lando Norris (McLaren) 2. Charles Leclerc (Ferrari) 3.
Oscar Piastri (McLaren) 4. Max Verstappen (Red Bull) 5. Lewis Hamilton (Ferrari) 6. George Russell (Mercedes) 7.
Kimi Antonelli (Mercedes) 8. Isack Hadjar (Red Bull) 9. Arvid Lindblad (Racing Bulls) 10. Nico Hulkenberg (Audi) The race day lineup promises intense battles, especially as drivers grapple with tyre degradation, fuel strategies, and the ever‑present threat of mechanical gremlins.
Fans can follow live updates, video highlights, and in‑depth analysis on Sky Sports’ WhatsApp channel, ensuring they stay informed throughout the weekend.