Despite widespread assumptions about Tesla’s gigacasting technologies, a new report reveals that large structural castings simplify both assembly and collision repair.
For years, a pervasive narrative has shadowed Tesla’s innovative gigacasting technology. While revolutionary for manufacturing efficiency, these massive single-piece castings were widely believed to be a repair nightmare, driving up costs and complexity in the event of a collision.
However, a new report from Thatcham Research directly challenges this assumption, concluding that gigacasting can actually save on vehicle repair expenses. This finding is supported by none other than Wes Morrill, Tesla’s Lead Engineer for the Cybertruck, who stated:
If you simplify the body design with large structural castings, it’s better both for initial assembly and for repair.
The Fears of Gigacastings
The traditional fears surrounding gigacastings centered on the idea that if a section of the casting was damaged, the entire piece would need to be replaced. That means exorbitant labor costs and extensive replacement of parts, small and large. The Thatcham Research study, however, presents a different reality, suggesting that the very design principles that help Tesla streamline production also inherently simplify repairs.
Fewer Parts, Easier Fixes
The core of that myth was based on a misunderstanding of how structural castings are designed and repaired. Conventional vehicle bodies are assemblies of hundreds of stamped metal parts, welded, riveted, and bonded together.
This creates numerous potential failure points and connections between parts, which can cause forces to propagate during a collision, resulting in damage to unrelated areas. Repairing such a structure often involves sectioning, cutting, and rejoining smaller components.
Gigacastings, by contrast, drastically reduce the number of individual parts. Tesla’s approach simplifies the vehicle’s body into a few large, structurally robust segments. This means fewer parts, so less labor, fewer welds, and faster production lines during initial assembly.
In collision repair, with fewer individual components and a more integrated structure, damage can often be more localized, or when a replacement is necessary, it involves fewer parts than repairing a traditional multi-segment body. Tesla uses advanced repair methods, including Gigacast Sectioning to replace only damaged portions of the casting, rather than the entire piece.
To put that into numbers, the study found that partial repairs on a Model Y's rear gigacast resulted in savings of over £2,000 ($2,700 USD) compared to similar repairs on a Model 3 with a conventional multi-part steel body.
Recasting the Repair Paradigm
The implications of this study are larger than you might think, especially for both the automotive insurance and collision repair industries. Insurers, wary of potential total loss scenarios due to gigacasting damage, will likely look to re-evaluate their models with this new information.
Repair shops, which might have anticipated requiring specialized equipment and training for gigacastings, will likely find the streamlined design, when approached with new techniques, easier and faster to repair than before.
Tesla’s first-principles approach to engineering, often focused on its manufacturing innovations, also extends its benefits throughout the vehicle’s lifespan. While multi-section bodies have been the norm, Tesla is always challenging, breaking, and redefining those rules. Gigacastings are here to stay and becoming more common throughout the automotive industry.
