A guide on updating your Ford Sync 3 based car to the latest Sync 3.4 version using Syn3 Updater to make the process as simple as possible for you!
Originally published at: Easily Update SYNC 3 Using Our Automated Method - CyanLabs
This Sync 3.4 update (build 22251) worked well, and thanks to CyanLabs for posting the file to download. I appreciate it. It is nice not to have the severe-delay response of the Sync 3 to a screen request. The “Biden-brain” lag is gone!! I installed this update in late December 2022.
Hi all,
I just used the updater to get from SYNC 3 to 3.4 and also new maps. The process worked flawlessly. My 2018 Mustang GT would not update at all using the Ford web page and instructions. I followed the FORD instructions to the letter, and no dice. The Cyan USB update was smooth and after downloading the files onto a USB it took just over 27 minutes to get the update installed.
Glad it worked out for you 
I tried the official ford update via usb and got the "updating system software " message on the top.
I reset the APIM and did a master reset.
Message gone.
I used this update and the update went through.
One annoying bug with 1.0 was that it didn’t remember my home network password.
I just did this 2 days ago, haven’t explored everything yet…kudos to the people(s) behind this…the latest NA 2 21 maps is nice.
