Get $75 off Sync 2 to Sync 3 Kits (back in stock ~5/28) thru June 7th using the code


Easy Ford Transit Connect 4″ to 8″ Sync 3 Upgrade Harness

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NaviUpgrade’s Ford Transit Connect Sync 3 Upgrade Harness is designed to make upgrading your base model Transit Connect to have Sync 3 an absolute breeze. Plug & Play, your install can be finished in as little as 45 minutes!


1 × 4" to 8" Sync to Sync 2/3 Base Upgrade Harness

In stock (can be backordered)


In stock (can be backordered)

The NaviUpgrade Ford Transit Connect 4″ to Sync 3 Upgrade harness is perfect for the DIY-er who is looking to add Sync 3 to his or her van, the easy way!

We also offer FREE programming files with your purchase, something no other online store does. This allows you to get up and running quickly using an OBDII dongle, without messing around with a bunch of settings or hex codes in FORScan.

Please feel free to check out our Guides tab for more information on what other hardware you’ll need to complete your upgrade.

We pride ourselves in providing the most value out of any online store when it comes to Sync 3 Upgrades. NaviUpgrade is constantly working on building out resources for our customers and fans to use on their own vehicles. Our goal is to empower all vehicle owners to feel comfortable upgrading their own vehicles.


Weight9 oz
Model Year


  1. Stan (verified owner)

    I used this harness in my 2016 Transit Connect, and it worked flawlessly! The wiring is high grade, and the connectors are high quality. I used this to take my non sync Connect to a sync 3 system, which required many extras in addition to this harness, but this was the starting point. Highly recommend Naviupgrade! Best customer support I’ve ever experienced! Shipping was lightning fast!

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