For Tesla 12/20/26pin to 16pin Male Female OBD2 Cable Connector Model 3 Model Y OBD 2 OBDII Diagnostic Tool Auto Adapter
12 Pin connector for Old Tesla model S Before Sept 2015
20 Pin connector for  New Tesla model S/X after 2015 
26 Pin Dual Connector for Tesla Model 3 Model Y after Jan 2019.
Description:
For 2019, 2020, 2021 Model 3 and Model Y - Creates an OBD2 output in a vehicle.
Full diagnostics - OBD2 port allows reading CANBUS data that is otherwise not available from main screen: battery pack temperature, motor temperature, cell voltage etc.
Our harness is designed to work with any good quality OBD2 scanner / code reader, which can properly manage CANBUS data. USB, Wi-Fi or Bluetooth-compatible.
Earlier Model 3 had a harness connector slightly different shape from ours, and it simply won't fit.
Supported apps, free and paid (Not included with this product).
Package List