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Recommended Parts to Flat Tow a 2019 Ford Fiesta ST-Line w/a Automatic Transmission  

Updated 08/27/2026 | Published 08/22/2026

Question:

I have a 2023 Tiffin Wayfarer 25TW. Am looking at purchasing a 2019 Ford Fiesta ST-Line. Automatic Transmission to flat tow. Can you please confirm the following Roadmaster components are suitable for this situation or if not, or if you have other suggestions, please share. RM-250 RM-8700 RM-524441-5 RM-643 RM-15267 Is there anything else I might be missing? I am also considering RM-4750 if it is appropriate. Thanks much!

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Expert Reply:

Hey Martin. Here's a list of parts that are a mix of what you referenced and what I recommend using to flat tow your 2019 Ford Fiesta ST-Line:

Tow Bar and Safety Cables - Roadmaster Falcon 2 Tow Bar item # RM-520 and item # RM-643

Base Plate Kit - Roadmaster Direct-Connect Base Plate Kit - item # RM-524441-5

Protective Screen - Roadmaster Tow Defender Protective Screen for Towed Vehicles item # RM-4750

Wiring Harness - Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit item # RM-15267

Battery Disconnect - Roadmaster Battery Ace Battery Disconnect w/ Key Fobs item # RM39ZT

Supplemental Braking System - Demco Stay-IN-Play Duo Flat Tow Brake System for RVs w/ Hydraulic Brakes item # SM99251

Brake Light Relay - Roadmaster Brake-Lite Relay Kit item # RM-88400

The only thing you missed is the battery disconnect item # RM39ZT. Other than that it was a well thought out and researched list.

The battery disconnect item # RM39ZT is a really convenient way of disconnecting your Fiesta's battery while it's being flat towed. You just have to hit a button instead of disconnecting the cables. Since your Fiesta has an automatic transmission disconnecting the battery is part of the flat tow procedure.

I couldn't find anything with the RM-250 part number on our site or Roadmasters but I assumed it was a tow bar based on the rest of the parts. The Roadmaster Falcon 2 Tow Bar item # RM-520 has a 6,000 lbs capacity and is compatible with the Direct-Connect Base Plate Kit - item # RM-524441-5 and the Tow Defender Protective Screen item # RM-4750.

The Demco Stay-IN-Play Duo item # SM99251 is going to be a better option than the Roadmaster InvisiBrake item # RM-8700 because it offers true proportional braking. It does not rely on a pressure based system that has to be retuned and adjusted like the InvisiBrake. Both are permanently installed and use a pressurize cylinder to press the brake pedal.

What kind of trips do you plan on taking if you go forward with flat towing the Fiesta you're looking at? Feel free to answer this and throw in any other questions you have, where it says Add Comment.

expert reply by:
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Jerred H
RM-4750
RM-4750
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