Always look for the "Full Chip" version of the Lexia 3 interface. These versions use high-quality optocouplers and the original 921815C firmware, ensuring stable communication with newer vehicles and preventing "communication error" messages. How to Install Diagbox 9.96 (VM Version)

However, standard versions of DiagBox are locked behind dealership subscriptions or limited functionality if you only have a generic OBD2 scanner.

: V9.96 supports most PSA cars up to approximately February 2022 . Newer vehicles may require version V9.129 or higher.