By ATN Editorial Team
Summary: Stellantis has unveiled Stellantis STLA One, a modular vehicle architecture due to launch in 2027 that folds five existing platforms into a single scalable design covering the B, C and D segments. The architecture targets 30-plus models and more than two million units by 2035, and is engineered to support multiple powertrains from a shared base.
Key engineering takeaway: Stellantis STLA One is the first Stellantis platform slated to integrate the STLA Brain software stack, the STLA SmartCockpit and steer-by-wire technology. It is 800-volt capable and uses cell-to-body battery integration with scaled lithium iron phosphate (LFP) chemistry to cut weight, cost and component count. Modular interfaces are engineered per energy by design, so the same body-in-white is optimised for each powertrain without sharing penalties between them.
Why it matters: Stellantis STLA One is the company’s clearest signal yet that it is consolidating onto a small number of global platforms — three by 2030, on which 50% of volume and up to 70% of components will be reused. For chassis, software and powertrain engineers across Stellantis’ brands, this is the point at which architecture decisions converge with the SDV stack and by-wire control on a single base.
Stellantis STLA One: One Architecture, Three Segments
- STLA One launches in 2027 and is designed to bring together five different platforms into one scalable architecture, reducing complexity and expanding coverage
- STLA One to cover B, C and D segments
- STLA One targets 20% cost efficiency, driven by modularity by design and battery choices
- STLA One is Stellantis’ first platform slated to integrate STLA Brain, STLA SmartCockpit and steer-by-wire technology
- STLA One is designed to grow into a mega platform supporting 30-plus models and targeting more than 2 million units by 2035
- By 2030, Stellantis targets 50% of volume on three global platforms, with up to 70% component reuse
Stellantis today introduced STLA One, a modular vehicle architecture designed to support multiple powertrains and vehicle sizes. STLA One will have a modular, scalable architecture with common interfaces to reduce complexity, speed development and targets 20% cost efficiency, driven by modularity by design and new battery choices.
STLA One supports Stellantis’ platform optimization strategy. By 2030, the Company targets 50% of volume on three global platforms, with up to 70% component reuse. This platform strategy is designed to shorten time to market, strengthen supplier stability and improve cost efficiency.
“STLA One is a clear example of a truly modular strategy, giving us the flexibility of a multi-energy platform without carrying inefficiencies from one propulsion system to another,” said Ned Curic, Chief Engineering and Technology Officer.
STLA One covers B, C and D segments with a new modular architecture engineered with dedicated per energy by design to optimize efficiency for each propulsion type from the start. STLA One is also a key step in Stellantis’ push to compete on cost, simplify operations and strengthen competitiveness, closing the cost gap with best-in-class players operating in Europe.
- Simplification at scale: Advanced technology architecture designed to reduce complexity while expanding market coverage
- Global reach: Designed to support 30-plus models and grow to more than 2 million units by 2035
- Modular by design: modular interfaces are designed to deliver the best possible performance for each type of energy use, supporting different powertrains
Intelligent Battery Strategy And Software Stack
STLA One is the first Stellantis platform slated to integrate STLA Brain, STLA SmartCockpit and steer-by-wire technology. This technology suite will support faster feature rollouts and enable each Stellantis brand to tailor the customer experience while reinforcing its distinct identity. Stellantis plans to launch STLA One in 2027.
- Scaling LFP (lithium iron phosphate): More LFP batteries to support affordability and reduce exposure to critical raw materials.
- Cell-to-body integration: Battery integrated into the vehicle structure to reduce cost, weight and complexity, optimizing embedded energy.
STLA One will also be 800-volt capable, delivering very competitive charging time and a better real-world BEV experience.
This intelligent battery strategy is intended to improve BEV economics over time, through reduced battery costs and simpler integration.
STLA One is part of Stellantis’ effort to align hardware and software on a shared technology stack. The platform’s modular design can help speed development, reduce complexity and unlock scale efficiencies.
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