DFRobot Arduino produced OBD II TTL compatible TTL serial adapter|arduino programmer|arduino rgb led matrixadapter hid - AliExpress
OBD II Adapter 1 to 3, OBD2 16 Pin 1 Male to 3 Female Diagnostic Adapter Connector For Auto Repair or Car Inspection Institution - Hengye Cable Factory Store
OBD-II TTL Adapter | Famosa Studio
The ultimate GPS and OBD-II data logger based on Arduino MEGA | ArduinoDev.com