Maserati Diagnosi is Maserati's diagnostic system. Maserati's workshop guidance identifies Diagnosi and Diagnosi EVO for reading stored fault codes, monitoring and testing systems and software downloads; specific functions vary by model and access. Maserati diagnostic reports.
EVO generations
Maserati describes EVO 2 as an upgrade to EVO with a Windows 10 tablet. Its bulletin states that EVO 2 natively supports M156, M157 and M161 diagnosis and can support earlier Diagnosi-covered cars using a virtual machine; the earlier Diagnosi tool cannot be used on M161 and later models. Model-year limits and installed software must still be verified for the vehicle. Maserati EVO 2 bulletin.
A 2021 Maserati bulletin also documents EVO 3 alongside Diagnosi and EVO/EVO 2. Maserati provides information about independent-operator licences and VCI-based programming options. Maserati EVO 3 bulletin; Maserati TechInfo conditions.
Earlier Ferrari/Maserati diagnostic equipment is described in SD3. See also Maserati diagnostic tools.
Maserati later specified that MDEVO 3 was introduced with the MDVCI 2 vehicle communication interface on 13 September 2021; its 2023 independent-operator bulletin lists full, light and extra-light kits and states that the full and light kits include MDVCI 2. Maserati independent-operator bulletin, September 2023.
A May 2025 North American bulletin warned that EVO 2 hardware exchange service might cease during 2025 as parts ran out. It nevertheless stated that MDEVO units would continue receiving software updates and helpdesk support; verify current regional support directly before selecting used equipment. Maserati North America bulletin MAS004704.