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Scuderia Ferrari appears to be facing some reliability challenges with its new 2026 power unit, a potential setback that could prove costly for the team as they prepare for the next season.
The Prancing Horse is reportedly encountering difficulties with its 2026 engine, as the team’s bold innovations might have pushed reliability limits. There’s a growing concern that Ferrari’s gamble on a highly innovative solution could have unintended consequences.
Whispers in the paddock suggest that Mercedes’ power unit might be the best on the grid. Ferrari also acknowledges that the German manufacturer could hold the early advantage. The reasons are clear: Mercedes can leverage its road car technologies to experiment faster and more efficiently. Additionally, McLaren, Williams, and Alpine all use Mercedes engines, multiplying test-bed hours to enhance efficiency and reliability. Ferrari, in comparison, will have support from Haas and Cadillac. This collaboration stems in part from the relationship between Fréd Vasseur and Graeme Lowdon. Until now, Ferrari had reportedly followed all the planned milestones for the 2026 engine—but now a misstep could prove expensive.
Zimmermann’s steel cylinder head struggles with reliability
The new 6-cylinder turbo, which will power the 678, relies on cutting-edge materials—but reliability remains a concern. The cylinder head is produced using Additive Manufacturing techniques, specifically Direct Metal Laser Sintering (DMLS). This advanced process employs a high-powered laser to fuse metal powders into components with highly complex geometries and remarkable mechanical properties. Various metals (aluminum, copper, and others) can be combined with non-organic materials like ceramics, opening endless possibilities for innovation.
Maranello’s engine has been running on test benches for several months to meet reliability requirements and avoid penalties throughout the season. Davide Mazzoni, Head of ICE, and his team designed a cylinder head capable of withstanding significantly higher temperatures than those encountered on race weekends. The multi-material fusion allows the head to endure extreme stress and manage heat efficiently. Ferrari is pursuing not only strong performance but also improved thermal efficiency, allowing tighter bodywork openings.
Maranello aims to recover ground on Mercedes
The Italian team is targeting highly streamlined sidepods thanks to smaller radiators. According to Motorsport.com, Ferrari’s engine department, led by Enrico Gualtieri, now faces the tough task of catching up with Mercedes. The cause? An initially proposed steel cylinder head by Wolf Zimmermann failed to meet expected reliability standards. Ferrari has therefore decided to step back and switch to an aluminum alloy, which will incorporate a revolutionary and strictly confidential intake system.
Oct 16, 2025
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