# Over-the-Air Updates in Electric Cars By EV Charge Cables ยท Published 18 October 2026 **The short version** Over-the-air updates push software improvements wirelessly to your EV, just like a phone update, with no dealer visit required. - Can update infotainment, battery management, safety systems, and security patches - Cannot change physical hardware or firmware-limited components - Not all EVs support OTA: many traditional-brand cars still require a dealer visit Over-the-air (OTA) updates let your electric car receive software improvements wirelessly, in much the same way your smartphone downloads a new operating system version overnight. The car connects to the internet via WiFi or mobile data, pulls down the update in the background, and installs it while parked. You do not need to book a dealer visit or drive anywhere. Not every EV supports this, but it is becoming increasingly common, and it means your car can genuinely get better over time. If you are still choosing your next EV, [use our reg checker to find the right charging cable for your car](https://www.evchargecable.co.uk/) once you have decided. | What OTA can change | What OTA cannot change | | --- | --- | | Infotainment software and navigation maps | Physical hardware (battery cells, motors, sensors) | | Battery management software | Firmware on components with no update pathway | | Range estimation algorithms | Charging hardware or connector type | | Safety and driver-assistance software | Structural or mechanical parts | | Performance parameters (on supported models) | Features the manufacturer has not enabled on your trim | | Security patches | Subscription-locked features (unless you pay) | ### How do over-the-air updates actually work? The process is similar to updating any connected device. Your car connects to the manufacturer's servers, either through a built-in mobile data connection or your home WiFi. The update package downloads in the background, often without any action needed from you. When the download is complete, the car waits until it is parked and, in many cases, plugged in before running the installation. A notification usually appears on the infotainment screen beforehand, and some manufacturers send an alert to your phone app as well. ### What can an OTA update actually change on my EV? OTA updates can reach any system that runs on software and has a connected update pathway. That covers a wide range of things: - **Infotainment:** new features, bug fixes, improved voice control, updated navigation maps. - **Battery management:** changes to how the car charges, how it balances cells, and how it reports state of charge. - **Range estimates:** improved prediction algorithms based on real-world driving data. - **Safety systems:** updates to automatic emergency braking logic, lane-keep assist, and similar driver-assistance features. - **Performance:** on some vehicles, manufacturers adjust acceleration or energy delivery through software. - **Security:** patches to close vulnerabilities in the car's connected systems. What OTA cannot touch is anything physical: the battery chemistry, the motor windings, the charging port, and any hardware component without a software update pathway. ### Do all electric cars receive over-the-air updates? No. OTA capability depends entirely on the manufacturer and the model. Brands that built their vehicles around software from the start tend to have the most comprehensive OTA systems. Many traditional car manufacturers, particularly those that adapted existing platforms rather than building EV-first architectures, still require a dealer visit for software updates. If OTA is a priority for you, it is worth checking the specification sheet for any EV you are considering before you buy. ### What are the benefits of OTA updates? The clearest benefit is that your car can improve after you have bought it. Fixes that previously required a workshop appointment arrive silently overnight. Security vulnerabilities can be patched quickly without any action from the owner. Manufacturers can also roll out new features gradually, testing them on a subset of vehicles before a full release. For owners, this means a car that stays current rather than becoming outdated as software standards move on. ### What should I watch out for with OTA updates? OTA updates are not without risk. Occasionally, a software release introduces new bugs or removes behaviour some drivers preferred. It is worth checking owner forums after a major update to see whether other drivers have flagged any issues. A second concern is subscription locking: some manufacturers use OTA to enable features remotely, but only for customers who pay an ongoing subscription. Heated seats, enhanced navigation, and certain performance modes have all been offered this way by various brands. Read the terms carefully so you know what your car includes outright and what requires an extra fee. ### What should I do before and after an OTA update? Before an update installs, make sure the car is parked somewhere safe, preferably plugged in so the battery is not drained during installation. Do not attempt to drive the car mid-update. Afterwards, check the infotainment release notes if available: the manufacturer usually lists what has changed. If something feels wrong after the update, contact the manufacturer's customer support rather than ignoring it. Most manufacturers can roll back individual updates remotely if a fix is needed. ### Frequently asked questions #### Do all EVs have over-the-air update capability? No. OTA support varies by manufacturer and model. Some brands deliver updates entirely over the air; others still require a dealer visit for all software changes. Check the specification details of any EV you are considering, as OTA capability is usually listed as a feature if it is present. #### Can an OTA update add range to my EV? Not directly. OTA updates cannot change the physical battery capacity. However, improvements to battery management software or energy delivery algorithms can sometimes make better use of the existing capacity, which may result in marginally more efficient performance in certain conditions. Do not expect a dramatic difference from a software update alone. #### When does an OTA update install? Most OTA updates download in the background and install when the car is parked and not in use. Many manufacturers also require the vehicle to be plugged in before installation begins. You will usually receive a notification on the infotainment screen or through the manufacturer's app, and you can often choose to delay the installation to a convenient time. #### Can I refuse an OTA update? In most cases, yes, at least temporarily. Many systems allow you to postpone an update for a period of time. However, security-critical updates may eventually become mandatory, and refusing them for too long can occasionally affect access to connected services. Check your manufacturer's documentation to understand your options for deferring or declining updates. #### Does OTA cost money? Standard bug fixes and security patches are almost always included at no extra charge. However, some manufacturers use OTA to deliver new features or unlock capabilities that require a subscription or one-off purchase. It is worth reading your ownership terms carefully so you know which updates are included and which carry an additional cost. #### What if an OTA update goes wrong? Contact your manufacturer's support team immediately. Most manufacturers can diagnose issues remotely and, in many cases, push a corrective update or roll back to a previous version over the air. If the car is undriveable, the manufacturer should arrange assistance. Documenting exactly what changed after the update will help support staff identify the problem faster. OTA updates are one of the more significant ways that electric cars differ from traditional vehicles: the software can genuinely improve over time. For everything else that goes into owning an EV, from choosing the right cable to understanding charging speeds, browse [our full guides library](https://www.evchargecable.co.uk/blogs/guides) or [use the reg checker on our home page](https://www.evchargecable.co.uk/) to find the right charging cable for your car. --- Canonical version: https://www.evchargecable.co.uk/blogs/guides/over-the-air-updates-in-electric-cars EV Charge Cables, EV charging cables matched to your car: https://www.evchargecable.co.uk. Some links in this article are Amazon affiliate links; as an Amazon Associate we earn from qualifying purchases at no extra cost to you.