1. Base Plates
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  4. Twist Lock Attachment
Roadmaster Crossbar-Style Base Plate Kit - Removable Arms

Roadmaster Crossbar-Style Base Plate Kit - Removable Arms

Item # 523173-4
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Retail:$449.00
Our Price: $415.00
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Base Plates 523173-4 - Twist Lock Attachment - Roadmaster
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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. Call 800-298-8924 to order Roadmaster base plates part number 523173-4 or order online at etrailer.com. Free expert support on all Roadmaster products. Guaranteed Lowest Price and Fastest Shipping for Roadmaster Crossbar-Style Base Plate Kit - Removable Arms. Base Plates reviews from real customers.
  • All Info
  • Reviews (82)
  • Q & A (18)
  • Photos
  • Why etrailer?

Roadmaster Base Plates - 523173-4

  • Roadmaster
  • Removable Drawbars
  • Twist Lock Attachment

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.


Features:

  • Hidden bracket design provides improved aesthetics compared with standard brackets
    • Crossbar-style brackets sit far back for a supremely clean look
  • Drawbars attach and remove quickly and easily
    • Arms click to lock in place in brackets
    • Built-in pull rings let you unlock arms so you can twist and remove them
  • Computer-cut, all-steel construction provides exceptional strength
  • Black powder coat finish is durable and corrosion resistant
  • Simple installation - no welding required
    • Custom base plates ensure a perfect fit for your vehicle
  • Compatible with Quick Disconnects and all Roadmaster tow bars
  • Instructions and mounting hardware included
  • Made in the USA
  • Limited Lifetime Warranty


The drawbars, or front arms, on the crossbar-style series base plate kit are supremely easy to mount and remove. Just insert them into the brackets and twist to lock them in place. To remove, simply twist the arms back and pull them out. Once the drawbars have been removed, the remaining brackets are virtually invisible. On most automobiles, the brackets are mounted within the grille, where they remain not only unseen, but protected from scrapes and scuffs, as well.



523173-4 Road Master EZ4 Base Plate Kit

Installation Details 523173-4 Installation instructions

This Product Fits The Following Vehicles





Customer Reviews

Roadmaster Crossbar-Style Base Plate Kit - Removable Arms - 523173-4

Average Customer Rating:  4.8 out of 5 stars   (82 Customer Reviews)

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.

- 523173-4
by:

Product works very well for towing our car. 673710



- 523173-4
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. 609242



- 523173-4
by:
2012 Chevrolet Sonic

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. 498530



- 523173-4
by:

Easy-to-use. Insrutions were thorough and easy to follow. 471548



- 523173-4
by:
2014 Chevrolet Sonic

Installation instructions supplied, and website videos made installation very easy.........thnks.. order delivery very fast....thnks. 315617



- 523173-4
by:
2013 Chevrolet Sonic

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!! 262915



- 523173-4
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. 248061



- 523173-4
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. 88880



- 521441-1
by:

Review from a similar EZ2 in Base Plates


installation instructions were clear and very helpful, took me about 4 hours to install, would have been faster if i had attempted anything like this before.. removing front fascia and trimming the openings. Easy to use. 909482



- 522013-1A
by:

Review from a similar EZ2 in Base Plates


Fast friendly and smart people at etrailer. Thank you 871817



- RM-52294-1
by: 08/29/2020

Review from a similar EZ2 in Base Plates


870942



- 521879-1A
by:

Review from a similar EZ2 in Base Plates


866892



- 52922-1A
by:

Review from a similar EZ2 in Base Plates


Love it looks good 864190



- 522013-1A
by:

Review from a similar EZ2 in Base Plates


2018 Fiat Abarth install - Videos of install from etrailer helped a bunch. My 2018 fog lights on the Abarth required some trimming on the inside of the bumper cover. Photos in the instructions did not accurately depict my 2018 Abarth, but taking the grill and fog light assemblies off of the bumper cover allowed me to see what needed trimming. Basically a 1 inch notch with the dremel did the trick. I also got the rock guardian and falcon all terrain tow bar. super quick to assemble and disconnect. CLEAN LOOKING INSTALL WHEN EVERYTHING IS REMOVED. 864157



- 523174-1
by:

Review from a similar EZ2 in Base Plates


Perfect fit. Love it 858150



- 521441-1
by:

Review from a similar EZ2 in Base Plates


Product was basically good there are several items and have that were off just a little bit that means a little more work made a lot more work to put the stall up but it eventually came out alright other dads are shipping was very good very fast I appreciate it that thank you very much 818991



- 521879-1A
by:

Review from a similar EZ2 in Base Plates


Installed on a 2011 Mini Cooper S hatchback turbo. Previous reviews were pretty spot on. Lots of plastic goes into these cars! My install (including brake light wiring), was 7 hours start to finish. Hardest part was removing the bumper facia to get at the metal bumper underneath. Be patient, take your time so you dont break any plastic clips! The base plate itself is VERY robust compared to the oem bumper! Adds about 20#. I did have to trim away some plastic flashing behind the facia where the air scoops go. Easy to do with a Dremel tool. When done, it is an extremely clean look! Very impressed with the fit and finish. Very easy to hook up. Went with Falcon 2 bar. Tows very well! Thanks etrailer!! 803793



- 524432-1
by:

Review from a similar EZ2 in Base Plates


Easy install especially after watching their helpful videos 798340



- 524425-1
by:

Review from a similar EZ2 in Base Plates


Very well made. Other than a couple of holes not lining up very well, which I have never seen anything line up perfectly, it was fairly simple to install. With the instructions that came with the base plate, that were very easy to follow, we were able to install with very little problems, and we are not all that mechanically incline. Lol 795040



- 522013-1A
by:

Review from a similar EZ2 in Base Plates


Seems to be well made. Bolted onto our Fiat 500 sport perfectly. Great installation instructions Looking forward to getting it on the road behind the motorhome soon Matched it up to the Roadmaster Tracker tow bar 787208



- 522013-1A
by:

Review from a similar EZ2 in Base Plates


etrailer's video were extremely helpful, product arrived on time, product was exactly as advertised. Installation was very straight forward. Thank you! My only concern relates to Roadmaster's requirement to retorque all bolts every 3000 miles. On my car, removal of the facia was required to install the baseplate - meaning - the facia must be removed during all trips over 3000 miles - in the field. I find this requirement unacceptable. Facia removal was the primary requirement to install the baseplate and removal every 3000 miles requires a better solution from Roadmaster. 786459



- 521236-1
by:

Review from a similar EZ2 in Base Plates


etrailer is the best company for anything in trailers you call them up and tell them what you have you tell them what you wanna do they know exactly the unit that you want any instructions pictures of how to install our fantastic I suggest to all my friends if they need anything and trailers to call he etrailer!!! 782033



- 524432-1
by:

Review from a similar EZ2 in Base Plates


This product installed perfectly. The printed instructions contain pictures which are not very clear, but the video of the installation was very helpful. We followed it step by step and the information was very clear. 736499



- 522013-1A
by:

Review from a similar EZ2 in Base Plates


Received product in a short time and perfect shape. Called to check on delivery time, spoke to a lady who spoke great English (not a foreigner) who had all the answers. Highly recommend them! 733760



- 524432-1
by:

Review from a similar EZ2 in Base Plates


This is the second base plate I have ordered and installed. etrailer has knowledgeable folks to answer questions and get the parts needed to complete the project. I had removed a BlueOx baseplate due to loosening bolts and no way to re-torque them. I watched an etrailer video about installing the Roadmaster on my CMax. It all went very smoothly and the install was completed in about four hours. They are my go to place for all things towing. Prices are always very competitive and they ship quickly. A winner. 729225


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Show More Reviews

Ask the Experts about this Roadmaster Base Plates

  • 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...
  • 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...
  • 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...
  • 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...
  • 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 # EZT20B, a braking system like the Blue Ox Patriot # BRK2016 and often a high/low hitch adapter to keep the tow bar level. The linked...
    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 # EZT20B....
    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...
  • 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...
    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...
  • 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....
    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...
    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-2000-1. 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...
  • 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...
  • 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...
    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...
  • 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...
    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...
    view full answer...

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Info for this part was:

Test Fit:
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Expert Research:
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Video Edited:
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