Hello everyone! I need help—I’ve read through the entire forum but couldn’t find a solution.
I have a 2018 Lincoln MKZ without built-in navigation. It came with Sync 3.4 (likely an unofficial install). After I bought it, it offered a Wi-Fi update, which I accepted, installing Sync 3.4 build 22251. Since then, it forgets settings on every startup. I’ve tried updating to newer versions, but no luck.
First attempt at updating gave me an INSTL_ERR12 error. Forum advice suggested a Master Reset, which I did—error cleared, and “Updating System Software” appeared. I waited over an hour, but nothing happened. Tried another version (23188) via Syn3 Updater—same result. Also used RW Data Cleaner—it finished in a minute and rebooted successfully, but I doubt it worked that fast. Soft reset didn’t help either.
The issue: “Updating System Software” hangs for over an hour with no progress, despite multiple attempts. The only error was INSTL_ERR12, which stopped after the reset—no other errors since. The APIM is original, MY18. I tried different USB drives and ports too.
Best regards,
Vlad
SYNC Region: EU
Navigation Variant: Non Nav
Manufacturer Year: Pre MY20
Install Type: OEM
Old SYNC Version: 3.4.22251
New SYNC Version: 3.4.22251
Do you have a error message, if so what is it?
There was an INSTL_ERR12 error, but I fixed it.
Update Method: Official Ford