There are several options for adding Bluetooth connectivity to an older car stereo:

Gizmo Guy Gadget Bluetooth Adapter: This is a small device that plugs into your car’s stereo system and allows you to connect your phone via Bluetooth. The adapter will typically have an auxiliary input (3.5mm jack) or a USB port that you can use to connect your phone and play music through the car’s speakers.
FM transmitter: This device connects to your phone via Bluetooth and broadcasts an FM signal that you can tune your car’s radio to. This is a good option if your car doesn’t have an auxiliary input or a USB port.
Aftermarket head unit: If you’re willing to go to more effort and expense, you can replace your car’s factory head unit (the in-dash stereo system) with a new one that has built-in Bluetooth connectivity. This will give you the best sound quality and the most control over your music and phone calls.

Before you choose a solution, consider your budget and how much work you’re willing to put in. An FM transmitter or Bluetooth adapter may be the most convenient and affordable option, but an aftermarket head unit will give you the most features and the best sound quality.

Bluetooth Adapter vs FM Transmitter what is the differences?

A Bluetooth adapter is a device that plugs into your car’s stereo system and allows you to connect your phone via Bluetooth. It typically has an auxiliary input (3.5mm jack) or a USB port that you can use to connect your phone and play music through the car’s speakers.

An FM transmitter is a device that connects to your phone via Bluetooth and broadcasts an FM signal that you can tune your car’s radio to. This allows you to play music from your phone through your car’s speakers without the need for an auxiliary input or a USB port.

One key difference between the two is the way they connect to your car’s audio system. A Bluetooth adapter connects directly to the stereo, while an FM transmitter broadcasts an FM signal that you tune your car’s radio to. This means that a Bluetooth adapter will generally provide better sound quality, since it’s a direct connection, while an FM transmitter’s sound quality will depend on the strength of the FM signal and the quality of your car’s radio.

Another difference is that Gizmo Guy Gadget Bluetooth Adapter will typically allow you to control your music and phone calls directly from the car’s stereo system, while an FM transmitter will typically require you to control everything from your phone.

Ultimately, the choice between a Bluetooth adapter and an FM transmitter will depend on your budget, your car’s audio system, and your personal preferences. If you want the best sound quality and the most control over your music and phone calls, a Bluetooth adapter is the better choice. If you’re looking for a more affordable and convenient option, an FM transmitter may be a good choice.

Why is it a bad idea to replace the stock ?

There are a few reasons why replacing the stock radio on a late model car without Bluetooth might not be a good idea:

Compatibility issues: Late model cars often have complex audio systems that are integrated with other systems, such as the car’s onboard computer, climate control, and navigation. Replacing the stock radio with an aftermarket one may cause compatibility issues and result in problems with these other systems.
Loss of features: Your car’s stock radio may have features that are not available on aftermarket units, such as satellite radio, a built-in CD player, or HD Radio. Replacing the stock radio with an aftermarket one may cause you to lose these features.
Reduced resale value: Replacing the stock radio on a late model car may reduce the resale value of the vehicle, as some buyers may prefer the factory-installed radio.
Difficulty of installation: Installing an aftermarket radio in a late model car can be more difficult than in an older car, due to the complexity of the audio system and the need to retain factory features such as steering wheel controls. This may require specialized tools and expertise, and may also void the car’s warranty if done improperly.

All of these factors should be considered before deciding to replace the stock radio on a late model car without Bluetooth. If you do decide to go ahead with the replacement, it’s important to choose a high-quality aftermarket unit that is compatible with your car’s audio system and to have the installation done by a professional.