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We are closed thru Aug 11th Due To a Family Emergency. Thank you for your patience.
We are closed through 08/11 Due to a Family Emergency. Thank you.
    (4 customer reviews)

    Easy 2015-2019 Ford Fiesta 4" to 8" Sync 3 Upgrade Wiring Harness


    1 × 4" to 8" Sync to Sync 3 Upgrade Harness B

    4 in stock (can be backordered)


    4 in stock (can be backordered)

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    The NaviUpgrade Ford Fiesta 4" to Sync 3 Upgrade harness is perfect for the DIY-er who is looking to add Sync 3 to his or her 2013-2019 Ford Fiesta!

    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.


    This harness will work for a 4" to 8" Conversion, also known as the Sync 1 to Sync 3 Upgrade for any base model 2013-2019 MK7 Fiesta. Trim level does not matter as long as you have 4" Sync 1 or an EU Equivalent. This harness is not for EU MK 8 Fiestas.Please be aware that this conversion harness and programming file combination will not work on vehicles other than a 2013-2019 Fiesta.
    Shipping & Delivery
    Free 2-3 Day Delivery for all US Purchases

    Flat $50 Fee for International Shipments
    If shipping costs more, we cover the cost, if it costs less, you get reimbursed the difference.

    4 reviews for Easy 2015-2019 Ford Fiesta 4" to 8" Sync 3 Upgrade Wiring Harness

    1. Mr.YODCHAI SOWAPAS (verified owner)

      Received the product successfully wait for installation If installed successfully, I will review it again. Thank you.

      (0) (0)
    2. Aaron (verified owner)

      Easy to use, well made. You won't find one of these anywhere else. Don't try the cheap ones on EBay like I did. It won't fit! The value of customer service and included programming makes this a no brainer. Please get this harness, I can't stress enough how valuable the resources you get with this are. There were multiple points in the project I would have given up if it weren't for the amazing support from NaviUpgrade. I will continue to buy their products for any other project I do.

      (1) (0)
    3. Alexandre G. (verified owner)

      Only reason it's not a 5 star is the price. Amazing product that works super well. Overall a great purchase.

      (0) (0)
    4. Julian B. (verified owner)

      Added a custom part to retrofit my car with sync 2

      (0) (0)
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    Brian Lovelace

    Brian Lovelace

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