Alientech KESS3MA004 -KESS3 Master – Marine & PWC OBD Protocols activation

The KESS3MA004 item is a software protocol activation license for the Alientech KESS3 Master tuning tool. It is not a physical device — it’s a digital activation that you apply to your existing KESS3 hardware.

• It enables OBD‑level ECU tuning and remapping specifically for marine engines and personal watercraft (PWC) through the vehicle’s diagnostic port.

• “Master” means it provides full read/write access — you can independently read and write ECU maps for supported marine/PWC ECUs.

• This activation includes a subscription for updates (often 12 months) so that the protocol definitions stay current.