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Dexter Electric Trailer Brake Assembly - 12" - Left Hand - 6,000 lbs

Dexter Electric Trailer Brake Assembly - 12" - Left Hand - 6,000 lbs

Item # 23-105
Our Price: $92.23
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Shipping Weight: 15 lbs
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23-105 - LH Dexter Trailer Brakes
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12" x 2" Driver's-side electric trailer brake assembly fits 6,000-lb axles. Mounting flange has a 5-bolt pattern. Fits 14-1/2" to 16" wheels. 1-800-496-5010 to order Dexter accessories and parts part number 23-105 or order online at Free expert support on all Dexter products. Great prices and Fastest Shipping for Dexter Electric Trailer Brake Assembly - 12" - Left Hand - 6,000 lbs. Accessories and Parts reviews from real customers.
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Dexter Accessories and Parts - 23-105

  • Trailer Brakes
  • Electric Drum Brakes
  • Brake Assembly
  • 12 x 2 Inch Drum
  • Dexter
  • LH
  • Manual Adjust
  • 6000 lbs

12" x 2" Driver's-side electric trailer brake assembly fits 6,000-lb axles. Mounting flange has a 5-bolt pattern. Fits 14-1/2" to 16" wheels.


  • Electric brakes are easier to install and offer more user control than hydraulic brakes
    • Requires only an electric brake controller (sold separately) - no actuator or hydraulic lines necessary
  • Adjuster plugs (included) cover access holes to keep dirt and grime out of the assemblies and off of the shoes
  • Mounting bolts sold separately
  • Made in the USA


  • Application: most standard hub-and-drum assemblies, including Dexter, Lippert (LCI), and AL-KO
  • Configuration: left hand (driver's side)
  • Dimensions: 12" diameter x 2" wide
  • Mounting flange bolt pattern: 5 bolt
  • Wheel size: 14-1/2", 15" or 16"
  • Axle rating: 6,000 lbs
  • Limited 5-year warranty

Exploded Electric Brake Assembly

K23-105-00 Dexter Electric Brake Assembly, LH - 6,000 lbs

Replaces 23-105

Customer Satisfaction Score:

Customer Reviews

Dexter Electric Trailer Brake Assembly - 12" - Left Hand - 6,000 lbs - 23-105

Average Customer Rating:  4.8 out of 5 stars   (152 Customer Reviews)

12" x 2" Driver's-side electric trailer brake assembly fits 6,000-lb axles. Mounting flange has a 5-bolt pattern. Fits 14-1/2" to 16" wheels.


Quality product and strainer staff are knowledgeable and answered all of my questions


Superb service. All items were packaged and shipped shortly after order was confirmed. Parts were received on time and well packaged. Currently at shop to be installed.


East to install and adjust. Once on the road broke in easily and they do a great job stopping my toy hauler.


The product is good but the packaging was insufficient and it arrived damaged. I was able to source a replacement from elsewhere and just never had time to follow up...


This was just what I needed to upgrade the brakes on my trailer and very easy instructions


First shipment of two 23-105, and two 23-106 arrived with grease contamination soaked into the lining on two assemblies and impact damage to the lining on a third. etrailer shipped three replacements promptly. Sticker on carton said "quality checked by Alex G. Perhaps Alex should find another line of work.
My major issue however is that after installing these I had to crank the power on my controller to maximum to achieve any helpful braking and can't even come close to wheel lockup which you need to adjust properly. I noticed that the new magnets were oval shaped unlike my old ones which were longer and flat on top and bottom (like the magnets pictured on the 7000lb assemblies). I assumed the style had simply changed since my magnets were made and I had no reason to look at 7000lb brakes as my axles are tagged 4400lb. All instructions on etrailer site state to select the brakes by the weight of your trailer which in my case is 9000lbs. Surely four 6000lb brake assemblies would be overkill..WRONG! My axles are 7000lb "de-rated" to 4400 but they obviously had 7000lb brakes. This caveat has caused me to install the wrong brake assemblies! If you are replacing your brakes and wish to duplicate your stopping power, do NOT listen the the "expert" answers on here. Compare the shape of the magnets. These small oval magnets are not as strong and braking will suffer. I still feel as though I should be able to achieve wheel lockup with these but not the case and since they have now been used, I can not return them.

Double check the adjuster down at the bottom of the brake assemblies. That adjuster should be used when the brakes are first installed. Use the adjuster to open the assemblies so that theyre putting a slight and even amount of drag on the wheel as you spin it by hand. If you have used the adjuster as outlined above and the brakes still will not engage properly, give us a call at 800-298-8924 and our Techs will help diagnose.
-- Etrailer Expert Patrick B - 10/14/2015


I checked here locally on the cost of trailer brake shoes and magnets and found the price of etrailers' complete brakes and magnets assembled on a new backplate was by far less expensive. After removing the drum, this meant near zero labor, just five nuts to remove and replace the backplate then splice the wires. And another BIG plus, free shipping on an over thirty pound shipment. Wow so easy...And now I have all new brakes, magnets and all the other parts too, just seems to good to be true. I will continue to tell everyone about this labor saving and great priced product. Thank you

Now a year later and 3,500 miles without any problem or issues. Looking back I am very pleased with my purchase and the excellent service provided by eTrailer. Thanks so much. Stay safe...
Edward S - 04/12/2020


Great replacements


Parts all fit properly and worked great. Good product.

The brakes have been in for a year and work great. Installation was really easy. They came well packaged and with everything needed.
Al - 09/25/2021


I bought a used toy boxa and quickly found out that the breaks were mowed down. I had trip planned to Yellowstone so, I needed these fast. They showed up on time and were the right part. I put them on drive from SoCal to Yellowstone which is 1500 miles. I re-adjust the break one morning in Yellowstone and haven’t looked back. Thank you!!!! Here is a picture of my trailer in Idaho. We camped here one night before we got to Yellowstone.


I was replacing the brakes on a 72 Airstream Argosy and needed a magnet but found out I could get whole new assemblies for $2.00 more! That's a deal! Just make sure if your backing plates have attached studs that you pick up the necessary grade 5 or 8 bolts, nuts and lock washers too.

Worked just fine. Sold the trailer
-- comment by: Terry N - 04/10/2014


Been a year, so far so good!


I replaced the electric brakes on my dump trailer, and bought the Dexter 6000 lb set, fully assembled and ready to bolt on. They fit perfectly and are of the quality that I expected for American made products. I am very happy with my purchase.


The new brakes work well on my trailer. However, when I replace them next time I will spend the extra $$ to get the self adjusting version.


Best value for genuine Dexter parts


I am writing this very favorable review of my online shopping experience with etrailer. Recently I had to replace the brakes, hubs, wheels and tires on my travel trailer. Please keep in mind that I am a 65 year old man without a lot of experience with online shopping. Never-the-less, I decided to give it a try in hopes of saving some money. To my surprise, etrailer made the experience very easy and painless. Before I placed my order on line, I had a question about one of the items on my shopping list, so I placed a call to them. I spoke with a very lovely and patient Customer Service Representative by the name of Michelle S. She was very helpful in answering my questions and encouraged me to call her back directly when I was ready to place my order; and so I did. During the shipping process, she kept me informed through emails the status of my order and everything arrived on time and in great shape. I truly appreciate the personalized services I received doing business with etrailer. They truly removed all of the uncertainty and nervousness of shopping online.


These parts were made by Dexter and were an exact replacement for my Dexter axles.


Easy assembly...


Well built not goodvto put everything in one box ups destroyed the box parts were all there . Yea


Less work than buying all the parts separately. Parts came in good physical condition. However, on 1 of the 4 assemblies, the adjuster and adjuster spring was loose in the packaging but was easily made whole.


Good quality material and excellent ser vice


EXCELLENT...... START TO FINISH. Fantastic service, great prices, quality products. Here's a before and after picture. It only took 30 minutes and basic tools to make the replacement. So much better than trying to clean up the old rusty one. Thanks again, Bill Borland in Michigan


Could bot be happier with the service in getting the right brakes. Better service than my local trailer shops. Thank you!


Good price, great quality, easy install ation.

After a cross country trip, I have to say I am very pleased with the product performance. I would recommend etrailer and its products to everyone I know.
Bill - 09/25/2021


First time I ordered from E-Trailer and having a hard time navigating this and finding the right parts, I called. James took my call and help me find the right parts. I will be buying from here again.

Show More Reviews

See what our Experts say about this Dexter Accessories and Parts

  • What is the Difference Between Dexter Trailer Brake Assemblies # 23-105-09 and # 23-105
    The difference is the mounting pattern. The Dexter # 23-105-09, brake assembly that you have referenced will mount to either an AL-KO/Hayes 4 bolt or a standard 5 bolt mounting flange. The # 23-105 just fits the standard 5 bolt pattern. Otherwise the specs are the same: 12 inch by 2 inch 6,000 pound axles Manual adjust Left hand side
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  • Comparing Trailer Brake Assembly # 23-105 and # 23-105-09
    Trailer brake assembly # 23-105-09 is specifically designed to fit AL-KO/Hayes axles which are not as common as other axles. Brake assembly # 23-105 fits Dexter axles and other more common axles. If you have an AL-KO/Hayes axle, then I would go with them.
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  • How to Choose Correct Axle and Electric Brakes for Trailer
    As you may imagine, with no information about a trailer other than the brand, it's simply not possible to tell you what might be sufficient to stop the trailer. Realistically, you need to know its GVWR to get both the proper axle rating and properly rated brakes. Without knowing a trailer's maximum loaded weight capacity, everything else is just a guess, and as an officer I'm sure you can appreciate that may not be the safest thing in the world. Sometimes you can get the general capacity...
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  • How To Tell If You Have Manual or Self-Adjusting Braking Assemblies
    The only true what to tell if a trailer has self-adjusting or manual adjusting braking assemblies will indeed be to remove the hub and look for the self-adjust cable (see photo). I am not aware of another method for this as the model number (if present) is generally placed on a sticker inside the assembly which also requires you to remove hub. The adjuster plug would be the same as well regardless. That said, although not as exact as the above if you were to craw under the trailer and read...
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  • How to Determine Which Side of Trailer a Brake Assembly Should Install On
    The easiest way to tell if a trailer brake assembly is installed on the correct side of the trailer is to pull the hub off and look at the actuating arm. The arm should be in front of the spindles on the side closer to the front of it. See attached picture. The picture you sent in I believe is for the right hand side but without a part number listed on that stamping it's hard to determine for sure.
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  • Can 5 Lug Hub Replace 4 Lug Hub on Harbor Freight Haul Master
    You would need to change out the hub like you mentioned, but that's not normally a huge deal. You'd just have to first determine what hub you have now so that we can pick out the correct one that fits it. You will need to know is what spindle you have on your trailer. In order to do that you can either get the inner and outer bearing numbers from a hub or use a dial or digital caliper to get exact measurements of the spindle. The measurements needed are the parts of the spindle where the...
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  • How to Pick Out Brake Assemblies for a Trailer with Idler Hubs
    Do you have idler hubs on your trailer currently? The way to pick out brakes for a trailer that has idler hub and a brake mounting flange is to first find the correct hub drum that fits the spindle and then go with the correct size/rated assemblies for those drums. To pick out the drums I'd need to know the diameters of the spindle where the bearings ride or the bearing numbers out of the hub as well as the bolt pattern of the hub where the wheel attaches. We can then pick out brake assemblies...
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  • How Do Trailer Brake Assemblies Adjust
    Use a brake adjustment tool to turn the starwheel on the adjuster to expand the brake shoes until the wheel is very difficult to turn by hand. Then back off the starwheel in the other direction, about 10 clicks until the brakes drag slightly. Make sure all brake assemblies are adjusted in the same manner. Check out the video (see link). Beginning at the 4:23 mark, our installer shows how to adjust your trailer brakes.
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  • Weak Braking Power After Dexter Braking Assemblies Installed
    If the left and right hand braking assemblies were switched that could cause poor braking performance like what you are experiencing now. In order to check this you will need to remove the hub/drum and take note of which side the actuator arm is facing. It should be facing the front of the trailer as you can see in the attached photo. If the arms are oriented correctly I would check that the brakes are adjusted properly. Even if you have self-adjusting brakes they will still require an...
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  • Rear Brake(s) on Trailer Get Hot Once in a While
    I am assuming you have electric brakes? If so there could be a number of reasons why the rear brake(s) on your trailer are getting hot. These reasons include but are not limited to lack of lubrication, spindle nut too tight, improper adjustment, failing brake magnets etc. However, since the issue only occurs every so often then it sounds like you have a wiring/magnet issue. I recommend checking all the wiring and making sure there is not any power on the brake output wire once the brakes...
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  • Troubleshooting Trailer Wiring Error Code that Shows Intermittent Connection
    Most likely your trailer connectors have a bit of corrosion in them which is causing an intermittent connection for your trailer wiring. Check the pins of your connectors looking for corrosion and/or bend pins and fix as needed and the issue will go away most likely. I attached a help article on brake controller troubleshooting for you to check out as well.
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  • Should All Trailer Brake Assemblies Have Same Adjustment Tension When Spun by Hand
    You'd want to get the drag as even as possible between all of the assemblies so that you get uniform braking activity. The 10 clicks back from lock up gets you pretty close but you'd want to fine-tune them as much as possible to be all the same. Based on what you did to get them all as tight as the tightest one you would be fine as-is.
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  • One Trailer Hydraulic Brake Assembly Keeps Locking Up on Tandem Axle Trailer
    Resetting the breakaway feature on a hydraulic braking system can be a little complicated depending on the actuator used. On most it is not as simple as just putting the lever back into place. There are things on the inside that have to be reset/adjusted as well. That could be part of the problem. But before digging into that the easiest thing to check is if there is a mechanical issue with the brake assembly that is giving you trouble. It is possible, even likely, that crud, dirt, or...
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  • Troubleshooting Trailer Brakes Stopped Working with Brake Pedal on Truck
    If the brake controller on your Silverado 2500 stopped working with the brake pedal then there is likely either an issue with the connection between the controller's red (brake input) wire and the brake switch wire in the truck or you might just have a blown stoplight or CHMSL fuse. You can first try looking through your truck's owner's manual to find the location for those fuses to make sure they are in good condition, replacing as needed. If this doesn't resolve the issue then you...
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  • How Does Trailer Electric Brake Assembly "Point" to the Front of Vehicle for Left or Right Hand
    I attached a picture that shows how the "pointing" of the arm looks. Basically if you look at the arm as the head of an arrow that will be the direction it points.
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  • Proper Orientation of Trailer Electric Brake Assemblies
    On a trailer electric brake assembly like the Dexter 6,000 Pound # 23-105 you were looking at the magnet itself should be at the bottom. The arm that is attached to the magnet should then be located on the front side of the trailer (towards the direction of travel). I hope this answers your question but if not please just let me know!
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  • Info Needed to Add Trailer Brakes to Trailer with Idler Hubs
    Sounds like you are looking to upgrade a trailer from having idler hubs to one that has brakes. There are several things to consider and determine to do this. If you check out the FAQ article I attached you will see exactly how to add brakes to a trailer that didn't have any. First thing to check for is a brake mounting flange behind the idler hub like what I attached a picture of. You will need to remove your hubs to either get the bearing numbers or spindle dimensions so that you can...
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  • Matching Wiring from RV Traditional Wire Colors to RV STANDARD Wire Colors
    There can be two standard type of trailer wiring color codes seen. Sounds like your motorhome's 6-way uses the colors that are green for taillight, brown for right turn/stop, red for left turn/stop, white for ground and black for 12 volt power (not used). So you'd run your 4-way colors of green on the 4-way to brown on 6-way. Yellow of 4-way to red of 6-way. White to white. Brown of 4-way to green of 6-way.
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  • Which Trailer Brake Magnet is the Ground Wire and Which is the Power Wire
    Trailer brake magnets are not polarity specific which means that either wire can be the power or ground wire. So basically you get to pick which of the two wires you want to be the ground or the power wire.
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  • How to Determine if Trailer Has Manual-Adjust or Self-Adjusting Electric Brakes
    If you look at the photo I've provided of a self-adjusting brake assembly, you'll see the adjuster cable highlighted. If your trailer brake assemblies feature that adjuster cable, you've got self-adjusting brakes. Each time the trailer brakes are applied, the assemblies will make small adjustments as necessary to keep the brakes properly adjusted.
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  • How to Adjust Electric Drum Trailer Brakes
    You are correct. On drum brakes that do not self-adjust, you would manually adjust the brakes using the star wheel on the assembly. Once you cannot turn the wheel, you turn the star wheel the other direction until the wheel can spin and you hear a slight constant drag on the brakes. If the brakes are not constantly dragging it could indicate wear on the shoes or drum. I have included a link to a video and at about the 4:39 mark our installed begins adjusting the brakes.
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  • After Replacing Trailer Brakes, Worn Parts, and Brake Controller the Trailer Brakes are Weak
    One possibility is that you have a weak ground for the brake magnets. Check the grounds and make sure they are attached to clean and corrosion free bare metal surfaces. Do the same with the main trailer connector and vehicle side grounds. You will need to adjust the brakes since you have replaced the old ones. I have included a link to a video that should help. At about the 4:24 mark, our installer adjusts the brakes. They should be adjusted so that they drag lightly but constantly when...
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  • How Often Should Electric Trailer Brake Shoes be Changed
    You cannot really go by miles when determining when brakes should be replaced. You would know to replace them the same way you would know with a vehicle. If performance is suffering and adjusting the brakes does not help and there are no other issues causing the poor performance it is probably time to change the brake shoes. Different applications, loads, driving styles and other factors have an effect on how quickly brakes will need replaced. Adjust the brakes every 3,000 miles or when...
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  • Mounting Holes on 12 Inch by 2 Inch Break Assemblies 23-105 and 23-106
    The brake assembly mounting pattern is different than the wheel assemblies for trailers or cars. The difference being that the wheel has to rotate in balance to provide a smooth ride but the brake assembly is stationary with the drum and wheel spinning around it. Measuring between the bolt holes, the measurement is 2-1/8 inches on center for all bolt holes except the widest pair, on the bottom, which is 3 inches on center. The diameter of the holes in the backing plate for securing the...
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