Answering calls is the most used feature from a Bluetooth car stereo, but listening to your favorite songs via a smartphone or other Bluetooth device is no doubt a nice option to have.
But What if Your Car Stereo Has No Built-in Bluetooth?
Adding Bluetooth to any car stereo is easily done with a FM transmitter or units that use an audio line-in.
There are many kits available that come in different designs and features.
The kits are low-cost items that are easy to hook up and have your vehicle stereo system Bluetooth ready in minutes.
How To Add Bluetooth To Your Old Car Radio
- To setup a FM kit the car stereo is set to an open frequency that no radio station broadcast on.
- The FM transmitter is then set to the same frequency.
- The transmitter can then talk to any Bluetooth device and broadcast it over the cars speakers through the radio.
Most kits are FM transmitter kits basically transmits to your car stereo the same way a radio station does.
Setting up a kit is easy and can be done in a few steps.
There are also auxiliary audio line-in kits that use a standard 3mm audio jack line that plugs into a stereo.
Below is some of our favorite options for low-cost FM Bluetooth car k.its
As Always be sure to read the reviews on Amazon, forums, here, or elsewhere to be sure a unit is a good fit for you.
*This post contains affiliate links.
Our Picks for Best FM Transmitters
- Nulaxy KM18
- Mpow MBR2
- VicTsing T11
- AUKEY BT-C4
Nulaxy Wireless In-Car Bluetooth FM Transmitter Radio Adapter Car Kit W 1.44 Inch Display Supports TF/SD Card and USB Car Charger for All Smartphones Audio Players
The Nulaxy KM18 is a nice Bluetooth FM transmitter kit that has a nice display and works very well.
It has a built-in microphone, SD-card slot, 1 USB port, and a 3.5mm audio line-in for any non-Bluetooth device.
The hands free calling works nicely along with playing music from a smartphone or from a SD-Card.
It is a low-cost unit that is a good buy for those on a budget and looking to upgrade a car stereo.
IMDEN Bluetooth 5.0 FM Transmitter for Car, 3.0 Wireless Bluetooth FM Radio Adapter Music Player FM Transmitter/Car Kit with Hands-Free Calling and 2 USB Ports Charger Support USB Drive
IMDEN makes this small unit that converts any car radio into a Bluetooth stereo.
Like all FM units the radio is set to a open frequency and the IMDEN then set to the same frequency. It will automatically transmit over the speakers.
It is a stubby unit and doesn’t have much length which makes it ideal for cigarette lighters that are located on the dashboard. If your vehicles cigarette lighter is located deep in a console than another unit would be better.
Mpow MBR2 Bluetooth Car Kits, Bluetooth 4.1 Reciever for Music Streaming, Bluetooth Aux Adapter with Dual USB Car Charger & Ground Loop Noise Isolator for Car Audio System with 3.5mm AUX Input Port
Mpow makes the MBR2 model that is built with more length. This makes it more ideal for cigarette lighters that are inside a console or deep in the dashboard.
It is a FM unit that also has two USB ports to charge devices. The extra USB charging ports are nice to have since many units don’t have this feature, and limit charging when only one cigarette lighter is available in a vehicle.
VicTsing Bluetooth FM Transmitter for Car, Wireless Bluetooth Car Adapter Car Kit with Hand-Free Calling and 1.44” LCD Display, Music Player Support TF Card USB Flash Drive AUX Input/Out
This unit from VicTsing is a short stubby unit with a nice display.
It has 2 extra USB ports on the side and nice control layout.
The phone button is in the center easily pressed for any incoming or outgoing calls.
AUKEY FM Transmitter, Radio Adapter Car Kit with USB Car Charger, Compatible with Smartphones
This unit from AUKEY ties into a stereo audio line-in and then connects to your Bluetooth device.
It doesn’t have a built in mic so there is no hand-free calling but plays music nicely from your devices.
AGPtek Upgraded Protable Car Aux Bluetooth Adapter, Bluetooth Receiver for Mp3 Music Streaming Sound Speaker System, Hands free Audio Adapter, Bluetooth Car Kits with 3.5mm Wireless Aux Jack Receiver
AGPtek builds this unit which plugs into a 3.5mm audio line.
This makes it ideal in areas that have many radio stations broadcasting or while traveling and different stations coming in over the FM frequency used by the Bluetooth adapter.
Large cities often can have so many stations they can interfere with a FM transmitter style unit. If you live in such an area and have a radio with an audio line-in than it is worth a look.
If your car stereo has no built-in Bluetooth than adding it is an easy task to do.
There is no need to replace the existing stereo with another expensive unit as a cheap low cost conversion kit is quick and easy to do.
Of course, it will not improve the sound of your car system so if it is an old unit and sounds horrible it may be time for a upgrade.
If your system still plays fine than a small kit will be all you need. Since it is using the existing system the kits only sound as good as the built-in unit.
Fm type units are the most used but Aux line-in units also work well and can be of benefit in areas that has a lot of FM signals.
This is also true for those who travel a lot, as a open signal may start broadcasting from a station. An audio line-in style unit would work better in such a scenario.
What works for one person may not work for another, so be sure to read the reviews on Amazon or elsewhere to be sure a unit is the right for for you.