OBD2 connector harness - For 2019, 2020, 2021 Model 3 and Model Y - Creates an OBD2 output in a vehicle. OBD2 Diagnostic Harness Scanner Splitter 26Pin Adapter for Tesla Model 3 Y. This harness is designed to work with any good quality OBD2 scanner / code reader, which can properly manage CANBUS data.