POST-MY18.5:
3.4 APIM NAV & NON-NAV Unit Firmware (Production Release, 2020 L Series)
GB5T-14G376-AA
1U5T-14G374-EK or 1U5T-14G374-EL
1U5T-14G375-DA (1U5T-14G375-CA NON-NAV)
GB5T-14G379-AA
5U5T-14G379-BC
3.4 APIM NAV & NON-NAV Unit Firmware (Production Release, 2019, K Series)
GB5T-14G376-AA
1U5T-14G374-EE or 1U5T-14G374-EH or 1U5T-14G374-EJ
1U5T-14G375-DA (1U5T-14G375-CA NON-NAV)
GB5T-14G379-AA
5U5T-14G379-BA
3.2/3.3 APIM NAV & NON-NAV Unit Firmware (Production Release, 2018.5, J-Early K Series)
GB5T-14G376-AA
1U5T-14G374-DA
1U5T-14G375-DA (1U5T-14G375-CA NON-NAV)
GB5T-14G379-AA
JB5T-14G379-BA
PRE-MY18.5:
3.0 APIM NAV & NON-NAV Unit Firmware (Production Release, 2017-Pre-2018.5, H-Early J Series)
(Originally Found On 2017/Early 2018 Units That Ship with 2 USB Ports on Back)
GB5T-14G376-AA
HB5T-14G374-CA
HB5T-14G375-DA or HB5T-14G375-FA (HB5T-14G375-CA NON-NAV)
GB5T-14G379-AA
HB5T-14G379-BA
3.0 APIM NAV Unit Firmware (Production Release, 2016-Early 2017, G-Early H Series)
GB5T-14G376-AA
GB5T-14G374-CA or GB5T-14G374-CB
GB5T-14G375-DA or GB5T-14G375-FA (GB5T-14G375-CA NON-NAV)
GB5T-14G379-AA
GB5T-14G379-BA
3.0 APIM NON-NAV Unit Firmware (Production Release, 2016-2017, G-H Series)
GB5T-14G376-AA
GB5T-14G374-AF (Use GB5T-14G374-CD to update)
GB5T-14G375-BA (or -BB)
GB5T-14G379-AA
GB5T-14G379-BA
Calibration File Region:
XXXX-14G375-A*.vbf 8GB / 16GB EU without NAV
XXXX-14G375-B*.vbf 8GB / 16GB NA without NAV
XXXX-14G375-C*.vbf 8GB / 16GB ROW without NAV
XXXX-14G375-D*.vbf 32GB NA with NAV (Telenav)
XXXX-14G375-E*.vbf 32GB CHINA with NAV (Telenav)
XXXX-14G375-F*.vbf 32GB ANY region with NAV (US Export vehicles) (Telenav)
XXXX-14G375-G*.vbf 32GB ROW with NAV (NNG)
XXXX-14G375-H*.vbf 64GB EU with NAV (Telenav)
XXXX-14G375-J*.vbf 32GB TURKEY with NAV (Telenav)
XXXX-14G375-K*.vbf 32GB UAE with NAV (NNG)
Thanks to AuRoN89 for the Calibration File Region info.
APIM Hardware Identification:
Generation 1: 2016-2017 two USB connectors.
Generation 2: 2017-2018 one USB connector, two holes in the case.
Generation 3: 2018.5-2019 one USB connector, one hole in the case, plastic FAKRA for GPS.