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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. 1-833-496-1390 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...


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


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


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

  • 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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  • 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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  • Trailer Disconnect Light Comes On, Chimes, on 2005 Ford F-250 without a Trailer Connected
    It sounds like there is a short. It is probably happening due to corrosion or dirt in the trailer connector on your 2005 Ford F-250. Make sure the connector is clean and free of corrosion on the pins and inside the connector where the wires attach.
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  • How to Adjust Electric Drum Trailer Brakes
    If your horse trailer has electric drum brakes like # 23-105 then adjusting them is fairly simple. I have included a link to a video to the right. If you fast forward to about the 4 minute mark you can see how our installer adjusts the brakes. Basically you will adjust them out until you hear a slight but constant drag of the pads on the drum. There are specialty brake adjustment tools you can buy locally but the right sized flathead screwdriver should be all you need. There is a star...
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  • Which Way to Turn Brake Adjuster to Tighten Trailer Brakes
    Turning the wheel so that the teeth on the wheel move upward will expand the brake shoes against the inside of the brake drums. Moving the teeth downward will contract the brake shoes. You can see the adjustment procedure by clicking on the video link I've provided. Simply fast forward to the 4:24 minute mark.
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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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  • Do New Electric Drum Trailer Brakes Need to be Adjusted
    Yes, you will need to adjust the new trailer brakes. You will need to adjust out the shoes until there is a slight but constant drag of the pads on the drum when you turn the wheel. I linked a video to the right and if you fast forward to about the 4 minute 40 second mark you can see how the adjustments are done and how much drag you should have left on the hub.
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  • Trailer Disconnect Warning Light Troubleshooting on a Ford Truck
    I checked on Ford truck message boards and the most common two reasons the Trailer Disconnect Warning comes on is either that there is corrosion or water in the trailer connector, there is a short on the wiring behind the trailer's connector or the magnets of the trailer are going out. The last one would be if the trailer was actually connected and the alert was going off. Most likely the problem is corrosion or exposed wire on either the front or back of the truck's trailer connector.
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  • What Colors are Trailer Brake Magnets Wires
    Brake magnets are made to fit their specific brake assemblies. They are not made to be interchangeable between brake sizes or weight capacities. The wire color most likely has to do with the choice of the manufacturer. I have linked a video that details replacement and wiring of a trailer brake magnet that should be helpful.
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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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  • Troubleshooting Weak Trailer Brakes Where One Magnet Does not Activate
    Since you ordered new brake assemblies I would think that once you install those and properly set the brake tightness you would be good to go. If the one magnet wasn't getting any voltage to it then that would explain why that assembly wouldn't activate. The voltage you tested for at the trailer connector would be normal if your controller was set for 5.25 volts as the max gain. For proper initial trailer brake assembly setup check out the video (see link). Beginning at the 4:23 mark,...
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  • How to Measure 5 Lug Trailer Wheel to Determine Bolt Pattern
    You most likely have a 5 on 4-1/2 inch bolt pattern but you would want to re-measure to be certain. The following dimensions from one stud center to the other will tell you which you have: 2-5/8" - the bolt pattern is 5 on 4-1/2 2-3/4" - the bolt pattern is 5 on 4-3/4 3" - the bolt pattern is 5 on 5 3-1/4" - the bolt pattern is 5 on 5-1/2 It also doesn't look like you have a standard trailer tire size on your trailer either. The closest we have is the 205/75-15 which I attached a link...
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  • How to Determine Proper Brake Assemblies for Chaparral Lite 5th Wheel
    I don't have a reference source that would tell me what brake assemblies were used on your fifth wheel, so to determine the correct brake assemblies needed, we'll need to do a bit of detective work. The brake assemblies you need will depend on the diameter and depth of your brake drums, the number of bolts the existing brake assembly uses to mount to the brake mounting flange and the axle's capacity. To get the correct size (10 x 2-1/4 or 12 x 2 inch are the most common) you would measure...
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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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    Image 1 for Image 2 for
  • Troubleshooting Trailer Brake Controller that Shows Trailer Disconnected Message
    The most common cause for a trailer brake controller to display the 'no trailer connected' error message is a damaged or corroded connector either on the vehicle or on the trailer. Corrosion can occur inside a connector too so you'll want to inspect both the external contacts and the back/inside of the connectors if possible for signs of any corrosion. Also check any wiring that plugs into the back of the vehicle socket. Even slight greenish or whitish discoloration can indicate a corrosion...
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  • Can Nev-R-Adjust Brake Assemblies Be Mixed with Manual Adjust Brake Assemblies on Trailer
    As long as all of your brake assemblies are adjusted properly it wouldn't matter if some of them were manual adjust and other were Nev-R-Adjusts. If the manual adjust brakes aren't kept in proper adjustment the Nev-R-Adjust assembly will end up wearing out quicker as more of the braking will be down with this assembly since the others wouldn't be as powerful. Ideally you would want to have the same on all wheels. I attached a page that has all of the brake assemblies we carry. You will...
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  • Troubleshooting Trailer Brake Adjusters and Springs that Break on Right Side of Trailer
    I spoke with a couple of the other experts and installer here and the only thing we can come up with is that maybe you have left hand brake assemblies installed on the right side of your trailer and that is why you are experiencing the issues with the adjusters and springs. The actuating arm (the arm that holds the brake magnet), should be in front of your spindle. Another way to look at it is that if the arm was the end of an arrow it should point to the front of your trailer. Check out...
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  • Trailer Brake Controller Shows No Connection to Trailer After Blown Tire
    I think I know what might have happened. When the tire let loose, it must have damaged the brake output circuit on your trailer. Each brake magnet has two leads, one that connects to the brake output circuit that leads to the trailer connector and ultimately to the brake controller. The other lead grounds to the trailer frame. If any of these wires has been severed, it'd cause the problem you describe. Start at the trailer connector, and trace the brake output circuit rearward to the brake...
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  • Troubleshooting Trailer Brakes that Lock Up When Brakes Are Touched
    Sounds like your trailer wiring connector on your Ford F550 has the brake output and stop light circuit shorted together and when you apply the brakes the full 12 volts that is supposed to go to your trailer lights is going to your brake assemblies and locking them up. What you will want to do is clean the pins of the connector on your truck and then check the wiring of the connector looking for any cut or exposed wire and fix as necessary.
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  • Troubleshooting Integrated Brake Controller that Only Works With Override Lever
    Sounds like the stoplight circuit signal isn't making it's way to the integrated brake controller of your truck so it's stopped working with the brake pedal. Since this is an integrated controller most likely the problem is a blown third brake light fuse. Replacing the fuse should fix the problem.
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  • Bolt Torque for Installing 12 inch Brake Assemblies on 6k Axle
    I spoke with my contact at Dexter and she informed me that you will need to tighten the attachment nuts to 30-35 ft-lb when installing 12 inch Electric Brake Assembly, part # 23-105, on your Dexter 6000 lb axles.
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  • Electric Trailer Brakes Just Started to Lock Up when the Trailer is Connected to Tow Vehicle
    Since the brakes are locking up when the trailer is connected and release when the trailer is not connected then the brake magnets have to be wired to something. My guess is that the 5-Pole was not original on the trailer and the previous owner used some alternate wiring for everything. First we need to get the wiring right as far as which wires does which function. I have included a link to our help article on trailer wiring with diagrams that show the functions of vehicle and trailer...
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