# Updating Sync 3 APIM Firmware (Calibration Files)

**URL:** <https://community.cyanlabs.net/t/updating-sync-3-apim-firmware-calibration-files/6896>\
**Category:** Discussion\
**Tags:** FORScan, SYNC3, APIM\
**Created:** [22 November 2022 21:34 UTC](https://community.cyanlabs.net/t/updating-sync-3-apim-firmware-calibration-files/6896 "2022-11-22T21:34:17Z")\
**Posts on this page:** 1\
**Showing post:** 53

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**Author:** ![F150Chief](https://community.cyanlabs.net/user_avatar/community.cyanlabs.net/f150chief/32/14712_2.png) [@F150Chief](https://community.cyanlabs.net/u/F150Chief)\
**Post date:** [21 May 2023 17:16 UTC](https://community.cyanlabs.net/t/updating-sync-3-apim-firmware-calibration-files/6896/53 "2023-05-21T17:16:16Z")

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> [@srle](#):
>
> Can i try MY18.5 Firmware?

> [@lingqifeng](#):
>
> Hello F150Chief, can you help me to identify which version I can flash?  
> my APIM is like below

I don’t recommend users to upgrade a G or H series APIM to MY18.5+ firmware, however, you can upgrade these to the latest firmware below. I you want to upgrade to the latest firmware, you may find the unit will “brick” and need to be restored. Below are links to the firmware versions and restore instructions.

[APIM Firmware Production Releases - Ford / Information - CyanLabs Official Community](https://community.cyanlabs.net/t/apim-firmware-production-releases/4686/2)

[APIM Firmware Flash Rescue - Ford / Information - CyanLabs Official Community](https://community.cyanlabs.net/t/apim-firmware-flash-rescue/4691)

This would be safe for the units.  
3.0 APIM NAV & NON-NAV Unit Firmware (Production Release, 2017-Pre-2018.5, H thru Early J Series)  
(Originally Found On 2017/Early 2018 Units That Ship with 2 USB Ports on Back)  
Secondary Boot Loader: GB5T-14G376-AA  
Strategy (F188): HB5T-14G374-CA  
Calibration (F124): HB5T-14G375-DA or HB5T-14G375-FA (NAV) / HB5T-14G375-CA (NON-NAV)  
ECU Configuration/Sound Profiles (F10A): GB5T-14G379-AA  
ECU Configuration/Illumination Strategy (F16B): HB5T-14G379-BA

**NOTE:** This listing is representative of the production release files for North America. Use the Calibration File Region listing below to determine the proper **-14G375-** calibration file for your region.

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