Cars are increasingly defined by the software that controls their features, connects them to services and manages their powertrain. The shift towards software-defined vehicles means a car can gain capabilities through updates after it leaves the factory. It also means software faults, cybersecurity and data privacy are now part of the ownership experience.
Cars are becoming software platforms
The source material points to vehicle operating systems, over-the-air updates, driver assistance, infotainment, battery management, diagnostics and cybersecurity. Tesla has made frequent software updates a visible part of its product identity; BYD uses its DiLink ecosystem; Volkswagen has invested in CARIAD; and Rivian has developed a software-led user experience. Their approaches and execution records differ.
Updates can improve—and disrupt—a vehicle
Software can improve navigation, charging management or interface features without changing the physical vehicle. But an update can also introduce bugs, alter a familiar control or create compatibility issues. A vehicle owner should know how updates are delivered, whether they can be delayed, what happens if installation fails and how the manufacturer handles security vulnerabilities.
The manufacturers are taking different routes
For automakers, software offers a way to differentiate products and maintain a relationship with customers after sale. It also creates long-term obligations: supporting older vehicles, securing connected systems, managing third-party services and responding to vulnerabilities. A polished screen is not enough if essential functions are unreliable or the company stops providing updates.
Software creates long-term obligations
Software is becoming as important as hardware, but it cannot replace sound engineering. Buyers should consider update history, reliability, privacy controls, service support and the vehicle’s physical safety alongside its digital features.
Buyers should look beyond the screen
Owners should pay attention to update notes, security notices and the manufacturer’s support policy over the life of the vehicle. Before installing a major update, understand whether it changes controls or driver-assistance behaviour. Automakers should provide clear communication, robust testing and a route to report problems. Software is now part of vehicle safety and reliability, not merely a feature added for convenience.