In some cases, that is already possible. And over the next few years, as the already extensive software on modern cars becomes even more feature-rich and upgradeable, manufacturers mean to step up the effort. They plan to offer many types of improvements or repairs through downloads that are beamed directly to the car via satellite, Wi-Fi or cellular signal, without the vehicle's having to be brought into the shop.

Eventually, your car will be serviceable like a giant smartphone, with new features added periodically while you sleep.

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