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Replacement Patch Cord for Roadmaster BrakeMaster Flat Tow Brake Systems
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Roadmaster

Replacement Patch Cord for Roadmaster BrakeMaster Flat Tow Brake Systems

Part Number: RM-921004
39 Reviews | 7 Questions
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$107.20
Retail:$142.95
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Replace the patch cord of your Roadmaster BrakeMaster supplemental braking system. 1-800-940-8924 to order Roadmaster accessories and parts part number RM-921004 or order online at etrailer.com. Free expert support on all Roadmaster products. Great prices and Fastest Shipping for Replacement Patch Cord for Roadmaster BrakeMaster Flat Tow Brake Systems. Accessories and Parts reviews from real customers.
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  • Reviews (39)
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Roadmaster Accessories and Parts - RM-921004

  • Flat Tow Brake System
  • Wiring
  • Roadmaster

Replace the patch cord of your Roadmaster BrakeMaster supplemental braking system.


Features:

  • Replaces the patch cord for your Roadmaster BrakeMaster braking systems
  • Length: 76"
  • Fits: Roadmaster BrakeMaster systems
    • RM-9060
    • RM-9060-900002
    • RM-9160
    • RM-9160-900002


921004 Replacement Road Master Patch Cord for Brake Master Supplemental Braking System







Customers Who Purchased This Accessories and Parts Also Bought...



Video of Replacement Patch Cord for Roadmaster BrakeMaster Flat Tow Brake Systems
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Roadmaster Replacement Cord BrakeMaster 9000 - RM-921004

Hi everybody. Andy here with etrailer.com. Let's take a quick look at this Roadmaster replacement cord. Now, this is going to replace a lost or damaged cord for your Roadmaster BrakeMaster 9000 and this airline assembly, also known as a patch cord, runs between your RV's air brake system and the BrakeMaster 9000 on your vehicle. It connects your RV's monitoring system as well as a supply of compressed air between your vehicle and RV. And this particular cord is 76 inches long and this cord is exactly like the one that you're needing to replace.

This is the direct replacement from Roadmaster. So what that means for you is you can trust that it's going to fit right in place of your original one, whether it was damage or whether you misplaced it. You're not gonna have to worry about compatibility issues, fitment issues, or anything like that. So if you are needing to replace a lost or damaged cord for your Roadmaster BrakeMaster 9000, this is going to be exactly what you need. Well, that's gonna conclude our brief look today.

I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me.

Customer Satisfaction Score:

Ratings & Reviews

4.9

39 reviews
5 Stars
(34)
4 Stars
(5)
3 Stars
(0)
2 Stars
(0)
1 Star
(0)
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by:
Exactly what I needed and very quick shipping!
Jeff J. profile picture

Jeff J.

9/16/2026

The cord is still working great! Over 30K miles traveled and it works every time without any issues!

Jameson C. profile picture
Etrailer Expert

Jameson C.

9/16/2026

@JeffJ that's great to hear!
by:
I got distracted while hooking up my dinghy, and dragged one end of the auxiliary brake airline on the road for 110 miles. The fittings are non-standard and none of the local RV shops carry them. But Etrailer had exactly what I needed, and it arrived in less than a week. I do wish that the price was a little lower though.
David profile picture

David

6/16/2019

It continues to work great.

by:
My tow vehicle air brake hose had come loose while driving and the quick disconnect fitting got destroyed when it was dragged on the pavement. I called etrailer and ordered a new hose at 4 pm and had the next day at about 11 am. I could not be more pleased with the excellent service. Thanks!!
Ed D. profile picture

Ed D.

5/23/2022

I’m still using this air brake hose and it has worked great the whole time.

by:
The Replacement Cord for Brake Master 9000 that I received was at least as good as the one that came with the Brake Master installed in my tow vehicle. Later, I ordered some fittings to reroute the air brake lines in my tow vehicle and I received them very quickly and they worked perfectly. Great product and great service.
by:
While on the road my brake line disconnected while traveling and was dragging on the ground which comprised the brass connection. I was able to get it to work but ordered a replacement. My next stop was in St Louis so I ordered this to arrive a couple days before I arrived. (referencing the delivery date stated on the web site at the time I ordered) I was in St Louis for 4 days and the package never arrived. It arrived after I had left St. Louis. I have asked my daughter to bring the package to me next month when she plans to visit me here in Texas. When a shipping company states that they will deliver on a certain date, they should deliver on that date, or at least close to it.
So I can’t review this product, or even know if it is the correct product that will replace my compromised one until next month.(I’m sure it will because etrailer.com is an amazing company)
by:
I recently bought a Diesel Pusher Motorhome equipped with Air Brakes. I had been using a Brake in the Box system to provide braking on my Toad, 2011 Ram 1500 Crew Cab 4 X 4.

The Brake in the box worked ok, but I wanted something that provided the same braking effect to the Toad that I was applying to the Motorhome. I was able to secure the Roadmaster 9000 Air Cylinder for the unheard of price of 150.00 on one of the Auction Sites!!

Then I turned to my friends at Etrailer to complete my system. The RM-921004 is used to connect the air from the motor home to the Toad, and works outstanding. You can't assemble the components for the price that etrailer sells it for. I also purchased the second vehicle kit, for the components to install in the toad and the Motorhome kit for installation in it.

The shipping was fast and all parts arrived in good order with instructions that make installation a breeze.
Thanks Etrailer, now we only have to say,,,,,Hurry Up Spring!!
by:
Replacement Air hose between car and motorhome. After 10+ years, I evidently did not connect it properly to the car and it was dragging behind the car and connector was damaged beyond repair. Product is great and provides great Auxiliary breaking with the car attached.
by:
always get good service from this place.
by:
The product performs as expected. The rev iew is about thew customer service I received from etrailer.com. In one word.... EXCELLENT!
by:
Order arrived before date promised and was exactly as stated etrailer is on my list of companies to deal with great service
by:
Top quality products, exactly what I expected. Shipped the same day as ordered and received within 3 days, it does not get better than this. Way to go etrailer!
by:
My order arrived on time. Product is as advertised and fit and worked perfectly. Many thanks!
by:
Exact replacement part
by:
I'm so grateful that Etrailer had the part I need for my motorhome. They had it to me in just a few days. GREAT service!
by:
I received exactly what I ordered and needed. The process was easy, the price was appropriate for the product and delivery was timely. What more can I say?
by:
Received the product in time and it works perfectly. Everything was exactly as advertised and delivered on time. I will buy from this company again.
by:
Worked perfectly. The usual GREAT customer service.
by:
shape. It appears to be a match to the old one.

I'd like to comment on the person who helped me on the phone when I called. She spoke perfect and understandable English, which is a big plus. But in addition, she was cheerful, helpful, knew what she was doing, and made the whole transaction pleasant and not a chore. Please extend to her my thanks.
by:
your staff was very helpful and kind. great service and would certainly recommend and would use again. thanks
by:
Travis profile picture

Travis

11/9/2023

works great. you can expect many years of use out of this brake line connector. slide it through your coiled light wiring and it will never drag the ground.

by:
This is an OEM spare to backup my pneumatic line in case it gets damaged again.
by:
good product and service.
by:
Product as pictured, Arrived quickly, good company to deal with.
by:
Exactly what we ordered and needed in order to complete the repair. Placed the order on 12/4 and arrived the next day as expected.
by:
Exactly like the original, at a competitive price, and an amazingly fast delivery. Who could ask for more (free maybe)!
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Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Jameson C
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Jameson C
Employee Adam R
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Adam R
Employee Dustin K
Video by:
Dustin K
Employee Chris R
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Employee Wilson B
Updated by:
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Employee Amanda K
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Employee Andy C
Installed by:
Andy C
Employee Bradley B
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