If you are looking to post on a community forum (like RadioReference or Groups.io ) to solve a password issue, use this draft:
A manual duplicator is insufficient. Use a semi-automatic code cutter (e.g., Futura or Silca) with a 3.0mm milling cutter. Cutting depth tolerance is ±0.05mm. kpg-111d engineering key
Note: Exact entry sequences vary by manufacturer and firmware version. Attempting unknown sequences can trigger locks or security counters. If you are looking to post on a
Kenwood reportedly disabled the "Engineering Serial" method in KPG-111D/DN versions 4.40 and higher Downgrading Requirement: kpg-111d engineering key
Software ecosystem and host integration
: Engineering keys are widely reported to work effectively for clearing passwords in versions like V2.80 and V4.00.