Supplier Soundbytes: When software takes the wheel
In the automotive industry, some technologies spend decades in the realm of promise before quietly becoming inevitable. Steer-by-wire is one of them.
For years, the idea of removing the mechanical link between the steering wheel and the road wheels felt more like a concept-car talking point than a near-term engineering reality. Yet in the latest episode of Supplier Soundbytes, S&P Global Mobility’s concise Autology podcast series, that assumption is challenged. Our guest is Jake Morris, portfolio director for steer-by-wire at ZF Group, and his message is straightforward: The conditions that once delayed steer-by-wire have largely disappeared.
The key shift lies in the rapid emergence of the software-defined vehicle. Modern electric platforms increasingly rely on centralized computing architectures, advanced electronics and integrated control systems. In such an environment, the steering system is no longer an isolated mechanical device but part of a broader digital ecosystem that governs how a car moves.
That change matters. Traditional steering relies on a physical column linking the steering wheel to the front axle. Steer-by-wire replaces this connection with electronic signals, sensors and actuators. For decades, concerns about safety, redundancy and reliability kept the technology at bay. Today, Morris argues, those concerns have largely been addressed. Production-ready systems now feature redundant safety architectures and high-integrity actuators designed to meet stringent global standards.
If the technology itself is largely solved, the real challenge has shifted elsewhere: integration.
For carmakers, adopting steer-by-wire is less about replacing a single component than about rethinking how multiple vehicle systems interact. Steering must work seamlessly with braking, propulsion and suspension control. The aim is not simply functional integration but coordinated vehicle dynamics — what suppliers increasingly describe as “motion control.”
This shift carries strategic implications for manufacturers. Carmakers must ensure that their vehicles retain a distinctive driving character even as control systems become more software-driven and modular. In other words, the digitalization of steering should not erase brand identity. Achieving that balance requires common control architectures that allow scale across platforms while preserving the nuances that differentiate one brand from another.
Yet the most striking implications of steer-by-wire may lie beyond the engineering department.
Once the mechanical steering column disappears, designers gain freedoms that were previously impossible. Without a shaft running from the cockpit to the front axle, vehicle packaging becomes more flexible. Crash structures can be re-engineered, cabin layouts reconsidered and interior design reimagined.
The driver experience changes as well. Steering characteristics — such as ratio, responsiveness and feedback — can be tuned entirely through software. At low speeds, the system can prioritize manoeuvrability; at high speeds, stability. Over-the-air updates may even allow manufacturers to refine steering feel long after the vehicle leaves the factory.
In the longer term, steer-by-wire also aligns neatly with the ambitions of automated driving. A steering wheel that is no longer mechanically connected can retract, remain stationary or operate differently depending on the driving mode.
For Morris, the conclusion is clear. Steer-by-wire is not merely a technical upgrade but a foundational element of the next generation of vehicles. As deployments begin across major automotive markets this year, the technology will generate real-world data and feedback, accelerating further development.
In that sense, the real story is not about removing a mechanical linkage. It is about transforming the chassis from a collection of components into an intelligent, software-coordinated system — one that promises new levels of adaptability, efficiency and design freedom.
And after years of anticipation, the industry appears ready to steer in that direction.
Jake Morris
Image source: ZF
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