Here we will take a look at the best solutions for every type of car stereo, for newer and older ones, without looking at replacing head units, as they are entirely different products. You can even change the whole stereo head unit to a new one with built-in Bluetooth, but that can be a very expensive solution. There are plenty of aftermarket Bluetooth solutions on the market for every need – you can connect via the AUX cable, via the FM transmitter, replacing the CD changer, or even a standalone Bluetooth solution with a built-in speaker. The problem is, most older cars don’t have built-in Bluetooth in their stereo systems and the only way to connect your smartphone to the stereo may be with an AUX cable, which isn’t useful for making calls. More importantly, you can make hands-free phone calls on the speakers – a great step toward better safety while driving. With Bluetooth, you can stream your music on your car’s stereo and even control the songs directly from it. There are a lot of aftermarket solutions so drivers of older cars can enjoy wireless calling or music streaming.īluetooth is a wireless technology standard for connectivity and exchanging data. A lot of older cars lack this tech feature, but there’s no need to go to a dealership to buy a new car just to have it. All new cars already come with Bluetooth compatibility, which makes it easier to stay connected safely while driving.