bing tracking image
  1. Tow Bar Base Plate
  2. Roadmaster
  3. Removable Draw Bars
  4. Twist Lock Attachment
  5. Partially Hidden
THIS ITEM IS NOT A FIT FOR
2016 Keystone Bullet Travel Trailer
etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
Roadmaster

Roadmaster Crossbar-Style Base Plate Kit - Removable Arms

Part Number: 523173-4
In Stock
$575.00
Retail:$632.50
You Save: $57.50
Tow Bar Base Plate
Not Confirmed to Fit

2016 Keystone Bullet Travel Trailer

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
By submitting this form, you understand and agree to our Terms of Sale, Website Terms of Use and Privacy Policy.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

etrailer Installation
We'll connect you with nearby partnered installers who know this exact setup.
Roadmaster's crossbar-style brackets are virtually invisible, easy to mount and simple to remove. Brackets install on your vehicle's frame to provide attachment points for your tow bar. Great Prices for the best tow bar base plate from Roadmaster. Roadmaster Crossbar-Style Base Plate Kit - Removable Arms part number 523173-4 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (2217)
  • Q & A (0)
  • Photos

Roadmaster Tow Bar Base Plate - 523173-4

Highlights

  • Custom Fit for Your Vehicle: Mounts to existing attachment points
  • Ready for Flat Towing: Installs on the frame to create secure connection points for your tow bar.
  • Blends In When Not Towing: Hidden bracket design leaves a clean, nearly invisible look when arms are removed.
  • Quick Hookups: Twist-lock drawbars click into place and release easily for fast setup and removal.
  • Built to Last: Computer-cut, all-steel construction with black powder coat resists corrosion and wear.
  • Hassle-Free Install: Bolts on with included hardware—no welding required for a custom, secure fit.
Made in USA

Features to know about

Made for a Clean Front End: Hidden Crossbar-Style Design

If you like your front end to stay clean when not towing, this kit makes that possible. The crossbar-style brackets sit far back for a supremely neat look, and once the removable drawbars are out, the remaining brackets are virtually invisible. They mount within the grille area where they’re protected from scrapes and scuffs, keeping your setup looking stock and tidy.

Quick Hookup Every Time: Twist-Lock Removable Arms

Getting connected is simple with the twist-lock arms. Just insert the drawbars into the brackets and twist to lock them in place—built-in pull rings let you unlock and remove them just as easily. It’s a straightforward setup that saves time when you’re getting ready to tow or unhook for the night.

Built Strong for Long Hauls: Computer-Cut All-Steel Construction

This base plate kit is designed to take on serious miles. The all-steel build is computer-cut for precision and strength, with a black powder coat finish that resists corrosion. The sturdy frame mounts provide solid attachment points for your tow bar and help distribute towing forces evenly across the chassis.

DIY-Friendly Setup: Bolt-On Install with Included Hardware

The kit includes full installation instructions and mounting hardware—no welding required. It’s built to bolt directly onto your vehicle’s frame, making it manageable for hands-on owners who like to handle their own installs. Once fitted, you’ve got a durable, long-term towing connection ready for road trips ahead.

Compatible with Roadmaster Tow Bars: Simple Integration

This kit works seamlessly with Roadmaster tow bars when used with the quick-disconnect crossbar (part?# 910021-00?– sold separately). That compatibility keeps your setup consistent and easy to manage, letting you attach and release your tow bar confidently every time you hit the road.

Specs

Construction and Design

  • Bracket Style: Crossbar-style
  • Material: All-steel, computer-cut construction
  • Finish: Black powder coat
  • Bracket Visibility: Virtually invisible when drawbars are removed
  • Attachment Method: Twist lock with built-in pull rings
  • Draw Bars: Removable
  • Mounting Location: Vehicle frame (within grille area on most models)
  • Corrosion Resistance: Durable black powder coat finish
  • Installation Type: Simple installation – no welding required

Compatibility

  • Tow Bar Compatibility: Compatible with Roadmaster tow bars using quick-disconnect crossbar (910021-00 – sold separately)

Included Components

  • Included: Instructions and mounting hardware

Origin and Warranty

  • Country of Manufacture: Made in the USA
  • Warranty: Limited Lifetime Warranty

523173-4 Road Master EZ4 Base Plate Kit

Installation Details 523173-4 Installation instructions

This Product Fits The Following Vehicles




Ratings & Reviews

4.8

2217 reviews
5 Stars
(1869)
4 Stars
(262)
3 Stars
(48)
2 Stars
(13)
1 Star
(25)
Review sort icon
Roadmaster's crossbar-style brackets are virtually invisible, easy to mount and simple to remove. Brackets install on your vehicle's frame to provide attachment points for your tow bar.

by:

Fit and finish is great, the illustration for what you trim on the bumper isn't great but otherwise pretty easy install (I ended up measuring between the mounts on the draw bar and just trimmed accordingly)



by:

Overall the installation was great, however the process of drilling 3 - 1/2" holes in that little bumper that has a Rockwell Hardness of about 60, seems to be a bit over the top.The instructions are spot on, delivery was great, the quality of product was accurate. I am a happy boy!



by:

Replaced same part that was damaged in a crash. I had used my original one for close to ten years without issue. Fast shipping from etrailer.



by:

The Base plate kit is well made and came with all the necessary hardware.Installation is relatively straight forward. I did have to enlarge two of the holes that didn't quite line up. But overall I'd recommend it.



by:

We towed our 2004 Subaru Impreza WRX STI 3000 miles last year, this is an ideal setup, discreet when not in use, solid, and easy to get on/off. Very please with the support I received from Roadmaster as one of the bolt was missing, was sent super quickly.



by:

Awesome delivery speed, and a well made base plate for my 2007 Element. Installation was a breeze (thanks to my son’s heated shop) and I had to do no cutting to make this fit. I had a Stowmaster tow bar that came with my RV and etrailer was able to steer me to the correct missing parts to make this a really affordable installation. Now to get out of this snow!



by:

The #118-3 is a perfect fit on my 1995 Geo Tracker. When you pull off the removable arms you would never know they are there. The Quality is very good easy to put on all you have to do is drill 4 holes the tube on the base plate fits into the tube on the frame of the tracker and with the 2 bolts it is a solid fit. I was worried about the plate nut getting it inside of the frame but it went in easy when you put it over the frame tube and use a thin piece of metal to slide it in place. I’m very happy with it. I probably could of got it on without taking my bumper off but with only 4 bolts holding my bumper on it made it easier



by:

Came quickly and is very high quality. Great directions/video from road master makes the installation step by step easy to follow.
Skill level is probably at the intermediate level depending on experience.



by:

Bolted right up. Installation should be done with bumper on, as you can't fit the ends through the louvers without some convincing. Works great so far. Was able to use a Stowmaster 5000 with it.



by:

Installation was a bit trying. Ended up looking very clean and almost invisible.
Using the tow bar worked super easy and our motorhome hardly noticed the Mini Cooper back there.



by:



by:

Very happy with your service-ordered Monday and got our Order wed the same week



by:

Tom W. profile picture

Tom W.

1/27/2024

Working perfectly! Just wipe it down and spray a little WD40 on it every once in a while. Thing will probably last longer than I own the car.



by:

First off, i'd like to say it went together great. Some of the pics took some studying, and I haven't figured out where I'm going to mount the break a way switch. Delivery was fast, I got it two days earlier than predicted.



by:

Product works very well for towing our car.



by:

Easy-to-use. Insrutions were thorough and easy to follow.



by:

Tough for an old man (83) and his old man brother-in-law (77) to get it mounted, but we got it done so I am completely satisfied with the product!!



by:

As usual, another excellent product from etrailer.com . I wanted to try to install it myself, but my wife didn't trust me(!). So I had a local body shop do it. They had never installed that part before, but with the great instructions I that came with the product, they did it.



by:

Product was as advertised, installation was as well with the additional help of the You Tube video. Video was helpful for a first timer.



by:

Installation instructions supplied, and website videos made installation very easy.........thnks.. order delivery very fast....thnks.



by:

This is the third baseplate I have installed on a car. The instructions are very clear and the photos are helpful to see. Better instructions (or photos) on pulling the side bumper up and out will help keep the locking tabs from breaking on the upper front fender area. A very good product with my Falcon 2 towbar.



by:

The Ez4 was went on while watching Video during each step. Used the 2012 Sonic Video. We were able to trim just enough without having to remove the ambient temp sensor. We are happy with the way it looks on the Sonic.



by:

It was easy to put on a Chevy sonic



by:

Great product and installation went very smoothly. Installed myself in about 2 hours. Fit perfectly and mounted easily to the car. My Stowmaster tow bar mounted right up to it. I deliver motor homes for a living and can already see how this setup is going to save me lots of time and aggravation over old fixed tow bar set-up I had previously.



by:

The installation took me about 7 hours, the facia removal was tedious , between the installation videos and instructions, I performed the task. This bar has one con, the pull rings on the removal bars are flimsy , my first pull stretched one out. I’m sure trailer has a fix for this under warranty, I hope.


25
25

See what our Experts say about this Roadmaster Tow Bar Base Plate

  • What is the Difference Between Roadmaster Direct Connect and Crossbar Style Base Plates?
    To answer the essence of your question before getting into some specifics, the difference between the cross bar and direct connect style of base plate can be broken down like this: the Roadmaster Direct Connect Base Plate # RM-523173-5 is going to provide for an easier connection to your tow bar than the Roadmaster Crossbar Style Base Plates # 523173-4 . A lot of people stick with Crossbar style base plates because they have an old tow bar they want to continue using from a previously...
    view full answer...
  • Recommended Flat Towing Setup for a 2014 Chevy Sonic
    The base plate kits we currently offer will fit all models of the 2014 Chevy Sonic. I recommend the Roadmaster EZ4 base plate kit # 523173-4 because the brackets are nearly invisible once installed. It's a simple installation as no welding is required. Note that trimming of your spoiler, air dam, grill or fascia may be required on some models. Since you are flat towing your 2014 Chevy Sonic, you will need the following items: a tow bar, safety cables, wiring and a supplemental braking...
    view full answer...
  • Which Accessories are Needed to Flat Tow 2013 Chevy Sonic
    To safely flat tow your Sonic, you will need the following items: a tow bar, base plates, safety cables, a wiring solution and a supplemental braking system. I would recommend the Roadmaster Falcon 2 tow bar, part # RM-520. The Flacon 2 features quick disconnects and auto-locking arms that allow you to couple to the RV even if the car is not perfectly lined up behind the RV. To provide an attachment point on the vehicle to connect the tow bar, you will need to install a base plate kit,...
    view full answer...
  • Parts Needed to Flat Tow a 2012 Chevrolet Sonic
    Before you begin flat towing your new 2012 Chevrolet Sonic, you will want to verify a few things first. If your vehicle has a 1.4 Liter engine and an automatic transmission, then it cannot be flat towed and must be towed using a tow dolly, like part # RM-2050-1. If it has a 1.4L engine and a manual transmission, or has a 1.8L engine and is automatic or manual, then you can flat tow your vehicle. The items that you will need to flat tow your vehicle are a tow bar, base plate kit, wiring...
    view full answer...
  • Install Video to Use as Guide for Base Plate Kit for a 2015 Chevy Sonic
    The Roadmaster base plate kit part # 523173-4 is a confirmed fit for your 2015 Chevy Sonic and I attached an install video that shows it being installed on a similar 2014 Sonic as yours. The install would be similar but the Roadmaster uses slightly different brackets that attach to different holes on the Sonic. The video will help you through the steps for accessing the portion of the vehicle where the base plate installs but wouldn't be exact.
    view full answer...
  • Parts Needed to Flat Tow a 2013 Chevy Sonic with a Sterling Tow Bar
    The Sterling tow bar, # RM-576, is compatible with all Roadmaster base plates. For a 2013 Chevy Sonic you can use EZ base plates # 523173-4. In addition to the base plates and tow bar, you have said that you have everything you need. But just to be sure I will cover the other items needed to flat tow a vehicle. If you do not already have safety cables (the Sterling tow bar should have them) you can use # RM-645. You will also need a light solution. The Sterling tow bar is supposed to...
    view full answer...
  • Trailer Hitch and Base Plate Kit Recommendation for a 2013 Chevy Sonic Hatchback
    Since you have a hatchback model of the 2013 Chevy Sonic you will have to get on of the hitches for your vehicle that has a visible cross tube. The hidden cross tube hitches are for the sedans only. Of the hitches that are confirmed to fit the hatchback models I would recommend the Draw Tite hitch part # 24878 over the Curt hitch part # C11258 as the Curt has a bracket that goes under the exhaust and the Draw Tite goes over it making it less visible. I attached an install video for you...
    view full answer...
  • Base Plates For 2013 Chevy Sonic Sedan
    The # 523173-1 base plates have been replaced with Roadmaster Base Plates, part # 523173-4, so that it is compatible with all Sonic models. This has a black powder coat finish, and has all the mounting hardware needed. I have linked you to an FAQ article about flat towing.
    view full answer...
  • Recommended Parts Needed For Flat-Towing 2013 Chevrolet Sonic
    When flat-towing there are a few things you need. You will need base plates, a tow bar, safety cables, lighting for the towed vehicle, and a supplemental brake system. I can help you with those items. For a base plate kit I recommend the Roadmaster EZ4 Base Plate Kit # 523173-4. The tow bar I recommend is the Roadmaster Falcon All Terrain, part # RM-522. For safety cables I recommend safety cables like part # RM-643. For lighting you can use a light kit like part # RM-2120. The...
    view full answer...
  • Base Plate Kit Recommendation for a 2013 Chevy Sonic
    As long as you get a Roadmaster base plate kit for your 2013 Chevy Sonic like the part # 523173-4 your current Roadmaster Falcon Tow Bar like part # RM-522 would work well. I attached a help article on flat towing for you to check out as well.
    view full answer...
  • Parts Needed to Flat Tow 2012 Chevy Sonic
    All of the parts you mentioned are a fit for your 2012 Chevy Sonic. The base plate kit part # 523173-4 is a confirmed fit and the other parts like the Roadmaster tow bar part # RM-520, safety cables # RM-643, and braking system # RM-9400 are a great fit. Since you will be using a magnetic light kit you don't need the relay # RM-88400 though.
    view full answer...
  • Recommended 2016 Chevrolet Sonic LTZ Auto Flat Tow Equipment
    For a permanent install braking system for your 2016 Chevy Sonic the SMI DUO Stay and Play part # SM99251 is the best option. But if you wanted something that installs easier but requires removal and re-installation every time it's used the Blue Ox Patriot part # BRK2019 is the best option for that. You'll need the outlet kit part # RM-9332 to go along with this to power it. For a base plate kit the part # 523173-4 is a confirmed fit and would work well. The most popular compatible tow...
    view full answer...
  • Roadmaster EZ4 Base Plate and Stowmaster Tow Bar Compatibility on 2012 Chevrolet Sonic
    The Roadmaster EZ4 Base Plate Kit # 523173-4 that fits your 2012 Chevrolet Sonic is fully compatible with their Stowmaster # RM-501 and all other Roadmaster tow bars. Flat towing a vehicle requires a number of components in addition to the base plates and tow bar. You also need for safe and legal flat towing safety cables like # RM-643, a lighting kit like # RM-2120, a braking system like the Blue Ox Patriot # BLU37TR and often a high/low hitch adapter to keep the tow bar level. The linked...
    view full answer...
  • Can Roadmaster Base Plate Arms from a 2008 Jeep Liberty Fit a 2012 Chevy Sonic
    Like the base plates that attach to the vehicle frame, the arms are also unique to the system and vehicle so the old ones would not work with the new vehicle. Base plate kits are not available without the arms. In addition to the base plates, you will need a compatible tow bar. The base plates for the 2012 Chevy Sonic are EZ style base plates compatible with all Roadmaster tow bars. If you do not have a Roadmaster tow bar there may be an adapter that will work. If you need safety cables...
    view full answer...
  • Recommended Tow Bar and Flat Towing Equipment for 2014 Chevy Sonic
    According to my research, the Sonic is capable of being flat towed, but I'd urge you to confirm that for yourself by consulting your owner's manual or Chevy. You'll need base plates like the Roadmaster # 523173-4 and a tow bar like the Roadmaster Falcon 2, part # RM-520. The Falcon 2 is very easy to use, featuring auto lock arms that allow you to hitch the tow bar up to the base plates even when the vehicle and the motorhome aren't perfectly aligned. You'll also need safety cables, part...
    view full answer...
  • Need Base Plates and Tow Bar for 2014 Chevrolet Sonic That are Easy Enough to Install Myself
    For your 2014 Chevrolet Sonic, I recommend going with the Roadmaster EZ4 Base Plate Kit, # 523173-4. These base plates offer simple installation with no welding required and best of all, we have an installation video that will walk you right through the process. Now for the tow bar, take a look at the RoadMaster Falcon All Terrain, # RM-522. The telescoping arms on this tow bar hook up with ease and automatically center and lock as you drive ahead to prevent sway and make hooking up quick...
    view full answer...
  • Does Cooling Modifications Required to Install Base Plate on a 2016 Chevy Sonic Affect Cooling
    There are some minor modifications needed to install the base plates for the 2016 Chevy Sonic like the part # 523173-4 and # 523173-5. Roadmaster has tested the vehicles thoroughly after making these modifications to determine that there was no adverse affect on the vehicles. Some holes need to be enlarged on the bumper, but there is no frame modifying to install the Roadmaster base plates.
    view full answer...
  • What Parts are Needed to Flat Tow a 2012 Chevy Sonic Behind a Class C Motor Home
    The first thing you are going to want to do is consult the vehicle owners manual for the proper towing procedure of the vehicle. If it states you can flat tow it then there are 5 items you will need. First, you will need base plates on the vehicle to provide a safe attachment point for a tow bar. You can use EZ2 style base plates, # 523173-4. These base plates are compatible with all Roadmaster tow bars. The most popular tow bar is the Falcon 2, # RM-520 that you have referenced. I have...
    view full answer...

Do you have a question about this Tow Bar Base Plate?


Info for this part was:

Employee Joe V
Test Fit:
Joe V
Employee Shane T
Test Fit:
Shane T
Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Andrew K
Video by:
Andrew K
Employee Joshua S
Video Edited:
Joshua S
Employee Chris R
Video Edited:
Chris R
Employee Adele M
Updated by:
Adele M
Employee Laura H
Updated by:
Laura H
Employee Tammy D
Updated by:
Tammy D
Employee Wilson B
Updated by:
Wilson B
Employee Mike S
Updated by:
Mike S
Employee Isabelle B
Updated by:
Isabelle B

At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.


Product Experts Available Now!
Call 1-800-940-8924