This seems like a straightforward question, but there are numerous answers depending on where you are in the world. Firstly, you don’t need to buy our OBD2 adapter. A *good quality OBD2 ELM 327…
Using CARISTA to enable the 4Runner's Hidden Features & Review
Carista OBD2 app-powered adapter
Everything You Need to Know About the Carista Adapter
I've received my Carista OBD2 Adapter. Next Steps…, by Carista
Carista OBD2 Bluetooth Adapter Auto Scanner & App Car Diagnostic Android iOS OBD
Carista: The business case for keeping our OBD2 adapter price so low, by Carista
What OBD2 adapter to buy with the Carista app on Vimeo
Bluetooth OBD2 scanners for your car
Carista OBD2 Bluetooth Adapter and App: Diagnose, Customize and Service Your VW, Audi, Nissan, Infiniti, Toyota, Lexus, BMW and Mini