What Are OTA Car Updates?

Most of us are now used to smart devices updating overnight. New features appear, bugs get fixed, and security improves, often without us giving it a second thought. 

Car technology is starting to work in a similar way. 

From improving navigation systems and infotainment to refining battery management and driver assistance features, remote updates are becoming an increasingly common part of vehicle ownership.

But what exactly is an OTA update in a car, what happens during the process, and are these updates safe? Here’s what drivers need to know.

What does OTA mean in cars?

OTA simply means Over-The-Air, which refers to updates being delivered wirelessly to a car without a physical connection.

Think of it like your smartphone update. A car maker releases an update, your car downloads it through Wi-Fi or mobile data, and the update is installed automatically or at a time convenient to you.

For drivers, the biggest benefit is convenience; improvements can be delivered remotely, without needing a trip to the dealership.

Why are OTA updates becoming more common?

Modern cars now rely on digital systems more than ever before, making remote updates increasingly useful.

This is particularly true for EVs and hybrids. Digital systems help manage charging, battery temperature, energy use, regenerative braking, and a growing range of driver assistance features. As a result, updates are no longer just about fixing problems. They can also refine how certain systems operate, and help keep your car up to date throughout its lifespan.

Can your car improve after you buy it?

One of the biggest benefits of OTA updates is that some cars can continue evolving long after they leave the showroom.

Depending on the make and model, OTA updates can introduce new functionality, improve existing features, or refine how certain systems work. A sat nav may become more accurate, an app connection may become more reliable, or charging systems may be optimised to improve efficiency. 

Not every update brings a noticeable change, but the ability to improve a car after purchase is one of the key reasons OTA technology has become such a significant part of modern vehicle ownership.

What can OTA updates actually change?

OTA updates can affect a wide range of systems, depending on the car and the update being installed.

Common examples include:

• Navigation and infotainment
• Charging and battery management
• Safety and driver assistance systems
• Vehicle security
• Bug fixes and software improvements

In EVs and hybrids, updates may also help to optimise battery performance and energy management. Many improvements happen quietly in the background, helping systems operate more smoothly over time.

What happens during an OTA update?

During an OTA update, a car downloads and installs new software while it’s parked and not in use. 

The process varies between manufacturers, but typically follows these steps:

1. An update becomes available for your model.
2. The car downloads the update.
3. A notification appears on the infotainment screen or companion app.
4. The driver approves the installation or chooses a suitable time.
5. The update is installed, and any affected systems will restart.

Some updates take only a few minutes. Larger updates may take longer, and can require the car to remain parked throughout the process.

Are OTA updates safe?

All OTA updates are designed to be safe, with multiple security measures protecting both the download and installation process.

Manufacturers use encrypted connections and testing procedures before updates are released. In fact, security is one of the key reasons OTA updates exist. They allow manufacturers to address vulnerabilities and strengthen protection protocols as new threats emerge.

Drivers can help with security by keeping companion apps secure, following official update notifications, and using trusted networks where recommended.

Will every car receive OTA updates?

No, OTA capability depends on the age of the car, its connectivity features, and the manufacturer’s technology.

EVs have led the way, but many newer hybrids, petrol cars, and diesel models now support some form of OTA updating capabilities.

The level of support varies. Some vehicles can receive updates for multiple onboard systems, while others may only support updates for navigation, infotainment, or connectivity features.

If you’re considering a used EV or hybrid, it’s worth checking whether OTA updates are supported and whether previous updates have been completed alongside the vehicle’s service history.

Do OTA updates mean fewer trips to a service centre?

OTA updates can reduce the need for some software-related visits, but they don’t replace any routine maintenance.

An update can resolve a digital issue, but it can’t inspect tyres, check brake wear, assess suspension components, or identify physical damage.

That’s why regular servicing remains essential. Even the most technologically-advanced car still relies on components that wear over time and need professional inspection.

EVs and hybrids are no exception. While they may have fewer moving parts than petrol or diesel vehicles, they still require checks on tyres, brakes, suspension, cooling systems, filters, and other safety-critical components.

Keep your car up to date and road-ready

OTA updates are becoming more common, particularly in EVs and hybrids, and are already changing the way vehicles are updated and maintained.

For drivers, the most important thing is simply to keep your vehicle’s software up to date when updates become available, and follow any guidance provided by the manufacturer.

While some issues can now be resolved remotely, regular servicing, MOTs, and routine vehicle checks remain just as important for keeping your car safe, reliable, and performing as it should.

If your vehicle is due for a service or MOT, book an appointment at your local Kwik Fit centre. You can also keep up with the latest motoring advice, EV guidance, and maintenance tips on the Kwik Fit blog.