Buy the wrong car today and you might be locking in a driving experience that never meaningfully improves. Buy the right one, and it could gain range, quicker acceleration, new safety features, or a smarter infotainment system while it sits in your driveway overnight. That gap is not marketing spin. It reflects a real, persistent split in how automakers have engineered their vehicles' underlying electronics, and it has been that way for long enough now that clear patterns have emerged about who does over-the-air updates well and who is still catching up.
Tesla built its entire product around the idea that a car is a computer with wheels, and its over-the-air update system has been the clearest expression of that philosophy since the company's early years. Tesla can push updates that touch infotainment, sure, but also things far more consequential: adjustments to acceleration behavior, battery management, charging curves, driver-assistance features, and even suspension tuning on certain models. This is possible because Tesla designed its vehicle architecture with centralized computing and software control in mind from the start, rather than retrofitting connectivity onto a car built around dozens of independent electronic control units supplied by different vendors. Rivian, as a newer entrant building electric trucks and SUVs, followed a similar architectural philosophy. Because Rivian did not inherit decades of legacy supplier relationships and fragmented electronics, it was able to design a vehicle platform where a large share of the car's behavior lives in software that can be updated remotely, echoing the approach Tesla popularized rather than the bolt-on connectivity many established brands have relied on.
Legacy automakers tell a more complicated story, and it is worth being specific about why. Companies like General Motors, Ford, Stellantis, Toyota, Honda, BMW, Mercedes-Benz, and Hyundai/Kia built their vehicles for decades around distributed electronic architectures, with individual modules controlling brakes, transmission, climate, infotainment, and dozens of other functions, often sourced from different suppliers with different update mechanisms. Retrofitting comprehensive OTA capability onto that structure is not simply a software problem; it is a hardware and organizational one. As a result, most legacy brands' OTA updates have historically been concentrated in the infotainment domain: map data, app updates, voice recognition improvements, and interface tweaks. Anything touching the powertrain, safety systems, or core vehicle behavior has often still required a trip to the dealership, where a technician connects diagnostic equipment directly to the car. That is changing, gradually, as these automakers redesign their electrical architectures around more centralized computing, but the transition takes years and typically arrives model generation by model generation rather than as a fleet-wide software push.
What Actually Separates a Good OTA System From a Weak One
The headline distinction people reach for is speed, but speed is the least interesting variable. The more meaningful differences are depth, reliability, and independence from the dealer. Depth refers to how much of the car's actual function can be changed remotely. A system that only updates the infotainment screen is doing something useful but limited; a system that can retune motor output, adjust battery thermal management, or patch a safety-critical control module is operating in a different category entirely, because it means the manufacturer built redundancy and validation into the update pipeline itself. Reliability refers to whether updates install cleanly and predictably, without bricking a feature, delaying delivery for weeks, or requiring the owner to babysit the process. And dealer independence refers to whether a meaningful problem can be fixed at home overnight or still demands an appointment, a loaner car, and a service bay.
Automakers that score well on all three tend to share an underlying trait: they treated software architecture as a first-order design decision rather than an afterthought bolted onto an existing platform. This is why Tesla and Rivian keep coming up as reference points. It is not that their engineers are inherently more talented than those at legacy automakers, but that their vehicles were conceived with a single, unified computing backbone rather than a patchwork of modules each requiring separate validation and separate supplier sign-off before an update can ship.
The Legacy Automakers Are Not Standing Still
It would be a mistake to read the above as a permanent verdict. Traditional automakers have been investing heavily in redesigning their electrical and software architectures specifically to close this gap, and newer platforms from these companies increasingly separate hardware from software in ways that make broader OTA updates feasible. The direction of travel across the industry is unmistakable: centralize the computing, reduce the number of independent modules, and build update infrastructure that does not require a dealer visit for every meaningful change. What varies enormously is pace. Some brands have made real strides in extending OTA reach beyond infotainment into areas like driver-assistance calibration or minor performance parameters. Others remain firmly in the infotainment-and-maps camp, with anything touching safety-critical systems still routed through service departments. If you are comparing two vehicles from legacy brands, the more revealing question is not whether either offers OTA updates, since nearly all now do in some form, but how far into the vehicle's actual operation those updates reach and how recently the platform's electrical architecture was redesigned.
Even the Leaders Have Had Rough Patches
None of this should be mistaken for an argument that comprehensive OTA capability is uniformly smooth in practice. Tesla's own update history includes instances of rollouts that introduced bugs, temporarily disabled features, or arrived unevenly across the fleet, and owners of any brand with aggressive OTA ambitions have occasionally found themselves waiting on a fix for a problem the update itself created. Frequent, deep updates cut both ways: the same architecture that lets a manufacturer fix a flaw overnight also lets it accidentally introduce one to an entire fleet simultaneously, which is a materially different risk profile than a dealer-administered update that gets validated on one car at a time before wider release. Comprehensive remote update capability also raises legitimate questions that go beyond convenience. When a manufacturer can remotely alter how a car performs, brakes, or manages its battery, it also holds significant power over what independent repair shops can diagnose and fix, which has fed into broader right-to-repair debates. And for dealers, a manufacturer's growing ability to handle software-related service remotely represents a real disruption to a service-department business model that has long depended on routine software and recall visits.
What This Means When You're Choosing a Car
If remote software capability matters to your buying decision, the practical takeaway is to stop treating "has OTA updates" as a meaningful checkbox, because nearly every new vehicle sold today claims some version of it. Instead, ask what specifically can be updated without a dealer visit, how the manufacturer has handled rollout issues historically, and how old the vehicle's underlying electrical architecture is. A brand-new platform from a legacy automaker, built with a redesigned centralized architecture, may now offer meaningfully deeper OTA capability than that same automaker's outgoing model, so it is worth researching the specific platform generation rather than assuming brand reputation alone tells the whole story. Tesla and Rivian remain the clearest examples of vehicles engineered from the ground up for deep, wide-reaching remote updates, and that head start, built over many years of architecture decisions, is not something a legacy competitor can close with a single new model launch. But the gap is narrowing steadily, and buyers evaluating any new vehicle in the next few years should expect the distinction between "OTA-capable" and "OTA-comprehensive" to keep mattering more than it has in the past.
- Tesla and Rivian remain the clearest examples of automakers with OTA architecture built from the ground up, reaching well beyond infotainment into powertrain, battery, and driver-assistance behavior.
- Legacy automakers such as GM, Ford, Stellantis, Toyota, Honda, BMW, Mercedes-Benz, and Hyundai/Kia have historically limited OTA updates to infotainment and maps, with deeper fixes still requiring a dealer visit.
- The real measure of a good OTA system is depth, reliability, and dealer independence, not simply whether a car receives updates at all.
- Legacy brands are actively redesigning their electrical architectures to enable broader OTA capability, but progress arrives platform generation by platform generation, not overnight.
- Even the most capable OTA systems have had rollout hiccups, and comprehensive remote update power raises fair questions about right-to-repair and the future of dealer service models.
- Bottom line: if deep, dealer-free software capability is a priority, Tesla and Rivian currently set the standard, while legacy automakers deserve credit for real but uneven progress that varies significantly by platform age.
