You can get Alexa in your car with Echo Auto, but there are a bunch of other ways, including that extra Dot you might have laying around.
Want Alexa in Your Car? How to Set Up and Use 's Echo Auto
How to Use Alexa in Your Car
Dodge Vehicles with Alexa Alexa in Your Vehicle
Complete Guide to Integrating Alexa Into Your Car - AskMen
Hyundai Adds Blue Link Skill For Alexa
Echo Auto 2020 ALEXA for Your Car: The Ultimate Tips and Tricks on How to Use Alexa Echo Auto eBook : Berners, Steve: Kindle Store
Echo Auto (1st gen) - Hands-free Alexa in your car with your phone
Which Cars Have Alexa Integration?
Memorial Day Echo Auto deal adds Alexa to your car for $19.99