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Replacement Trailer Brake Magnet for 12" Brake Assemblies

Replacement Trailer Brake Magnet for 12" Brake Assemblies

Item # BP01-180
Our Price: $54.38
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Shipping Weight: 1.05 lbs
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Trailer Brake Magnet for 12 Inch Hub/Drums
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  • Reviews (35)
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  • Videos (1)
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Redline Accessories and Parts - BP01-180

  • Trailer Brakes
  • Electric Drum Brakes
  • Brake Magnets
  • Redline
  • 12 x 2 Inch

Trailer Brake Magnet for 12" Hub/Drum

  • Fits:
    • Dexter 12" x 2" 6K
    • Alko 12" x 2" 6K and 7K after 1988 (not centerline)
    • Hayes 12" x 2" 6K and 7K after 1988 (not centerline)

BP01-180 Trailer Brake Magnet for 12" Electric Trailer Brakes

Video of Replacement Trailer Brake Magnet for 12" Brake Assemblies

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Redline Trailer Brakes BP01-180 Review

Today, we're going to take a look at the replacement trailer brake magnet for the Dexter, Alko, and Hayes 12" electric trailer brakes, this part includes everything shown here on the table, the magnet itself, the spring, and the clip to hold the magnet into place. This magnet kit will allow you to replace the worn-out magnet on your 12" trailer brakes, and because you're replacing just the magnet, not the whole assembly, it will save you time and money. This part is designed to work with the following brake assemblies, it'll work with the Dexter 12" x 2" on a 6000 pound axle, the Alko 12" x 2" on the 6000 and 700 pounds axles, the after-1988, and the Hayes 12" x 2" 600 and 7000 pound axles after 1988. If you notice, the magnet is an oval design, and they do that to increase the efficiency of the magnet, and to also extend the life of the magnet. Just to give you an idea of the size on this, the width of it you can see is about 3 1/8", and the height going to be right at about 2". You also notice, when the wires come out of the magnet, they have a section of a protective sleeve over that, and the reason they do that is because, when this is installed in your brake assembly, that initial part of the wire is what goes through the backing plate, so you don't want the wires rubbing up against the backing plate and causing problems, so they put this nice, protective sleeve on here to protect the wires from getting damaged. Also, if you notice, it has the two wires, two black wires coming out of it. It doesn't matter which wire from the magnet is attached to the power or the ground, you just want to make sure that one of the wires is properly grounded, and then the other wire will be attached to your electric brake output circuit from your trailer connector.

That should do it for the review of the replacement trailer brake magnet for the Dexter, Alko, and Hayes 12" electric trailer brakes.

Customer Satisfaction Score:

Customer Reviews

Replacement Trailer Brake Magnet for 12" Brake Assemblies - BP01-180

Average Customer Rating:  4.8 out of 5 stars   (35 Customer Reviews)


Everything I needed to replace the old brake magnets.


I'll give a #4 for now, they were slow getting here and I only have one installed right now ! The real test is when I haul my 40' trailer down the road for a few thousand miles, then I will know how well they work.

Richard H.


They are doing exactly what they were designed to do !


My trailer is very old. It is home built and the brake plates were welded on the axles and I had to turn the axles around to get the brake actuators to function in the proper manner. While I was working on it, I realized the magnets needed replacing, but the originals were of a brand I couldn't find. I managed to measure the old parts and found the correct replacement on at less then half the price a local trailer shop wanted for a similar part. The magnets were exactly the right part, they arrived a day sooner then I expected and the brakes are back together and functioning as advertised. Now if it would stop raining I could get the axles back under the trailer and get the brakes wired up again. I'm not complaining about the rain, and certainly am happy about the parts and quick service.

Bob W.


Thanks for checking back with me as I had completely forgotten the trailer brake issues I had last year. The brakes are still functioning fine and we are now using that trailer to haul logs and equipment on a regular basis with absolutely no problems with the brakes. I wish I had reworked them earlier and would recommend the parts I used to anyone with a similar issue.


What I needed and got to me in time ! Easy to install. Also e-trailer has a slug of instructional videos. My brakes were sorely out of adjustment. A couple minutes reviewing the video and a few more adjusting the brakes and I'm a happy camper.

Jerry D.


My order was correct and shipped promptly at a very reasonable shipping cost. Very satisfied with the service, I give it 5 stars


Works just fine. Takes about the same effort as replacing the whole brake unit. But is cheaper. If caught early enough, you only need the clip inside.


Had one ready to replace this spring - the wire on the old one had gotten caught in the brake mechanism. Glad I ordered the kit.


Installation was easy and best of all they work! Many thanks to the Technical Support Team for helping me find the ones that match the trailer and troubleshoot that darn "beeping" noise coming from my truck brake controller.


I thought had an issue with my wiring and after doing a little research I figured out it was more than likely due to worn magnets. I was able to locate the correct type, order, and replace the magnets fixing my problem! I saved money by installing them myself!


All products bought are working perfectly. These parts are good quality for the money. And more importantly, E trailer's customer service is why I only buy my trailer parts from them.


part was direct fit replacement, easy install works like the other 3 wheels.


awesome service and fast shipping. Thank You Bunches!!


Magnet replaced an ALKO magnet. Same quality and design.


Ordered genuine Dexter part and got another brand


Product fairly priced, correct product shipped with the cost of shipping reasonable. Very satisfied.


Promptly shipped and it was the correct part.. Thanks E-Trailer, you never let me down..


Excellent replacement.


product was delivered when promised


Received the other items
as promised, right on time. They were exactly what I ordered. Thanks


I ordered four magnets and I received them in three days as they bumped me up to a quick ship at no additional charge. Installed with no problem and they are working fine.


Very easy to order. Received order very quickly. Haven't installed them yet.


Very fast shipping, well packaged and a direct replacement for my worn magnets. Etrailer makes it easy to get the right part for my old 5th wheel.


Exactly what I ordered and fast delivery


Exactly what was ordered and arrived in excellent condition




Show More Reviews

See what our Experts say about this Redline Accessories and Parts

  • Troubleshooting An Electric Drum Trailer Brake that Will Not Release On One Side
    I would start by checking to see if 12 volt power is constantly running to the right brake. If it is for some reason, trace the wiring to make sure it is connected in the right place. Also make sure the ground is attached to a clean and corrosion free bare metal surface. Then, you can go back and basically start from scratch with the installation. Make sure that everything is properly installed and that the brakes are adjusted correctly. You can also test the magnet. I would check the...
    view full answer...
  • Can the Brakes On A Motorhome Axle Be Replaced?
    Since motorhome axles are considered one time use, they are not designed or intended to be used with standard trailer parts. With that being said, you're going to have to replace your axles. I know this is not what you were looking to do, however in this situation it is going to be the only viable solution for you. I'd be more than happy to assist you find what you're needing, however I am first going to need to a couple of measurements. I'm going to need the distance from the spring...
    view full answer...
  • Troubleshooting Trailer Brakes that Lock Up When Connector is Connected
    When we see this problem it's almost always with a 6-way trailer connector being used. The issue is that there are two ways that a 6-way is typically wired and the only difference is that the 12 volt accessory circuit and the brake output circuit are swapped. Anytime we see trailer brakes immediately locking up when connected and there's a 6-way involved this is the issue. What you need to do is swap the two circuits on the 6-way adapter or the 6-way connector and you'll be good.
    view full answer...
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  • Trailer Brakes on 1977 Camper Will Not Release when Going Forward
    It could be the magnets, wiring, or the trailer connectors on the trailer and truck. First, make sure that the truck and trailer connectors are clean and free of corrosion on the pins and where the wires attach. If you are using a 6-Way round trailer connector, one problem might be the positions of the brake output and 12 volt power pins are switched either on the truck or trailer connector. I would need to know what connectors are being used on the truck and trailer. Check the brake controller...
    view full answer...
  • Troubleshooting One Brake Locked Up on Trailer
    Sounds like there could be a short in your trailer wiring for one of the brakes or there could have been a mechanical failure in that one brake assembly. The second possibility is more likely since only one brake was affected. First inspect the wiring to the affected brake (and the others too) to check for signs of damaged wires or worn insulation that could cause a short. If the short was near the one brake assembly then that might cause the issue to be isolated to the one brake. Also...
    view full answer...
  • Troubleshooting Trailer Brake Magnets that Have Voltage to Them But Arent Activating
    It has to be the ground then of the brake magnets. If they are all getting voltage and not applying the problem is the grounds. Make sure the magnets are connected to a clean portion of the trailer frame or you can run ground wires from each magnet back to the main ground of the trailer wiring harness. When the magnets are activating you should hear them click as they grab the drum and you'll also hear a low hum too.
    view full answer...
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  • Are Trailer Brakes Always On or Off When Not Connected to a Tow Vehicle
    Unless something is putting voltage on the brake output circuit of the trailer wiring the brakes of the trailer wouldn't be activated. So if your trailer wasn't plugged into a tow vehicle the trailer's brakes should not be activated unless the off-chance the breakaway system's pin has been pulled. I attached an FAQ on breakaway systems for you to check out as well as an FAQ on brake controllers that you may find helpful.
    view full answer...
  • Would Installing Higher Rated Brake Magnets Increase Braking Power
    The magnets of a brake assembly do not actually give the brakes more or less power. You want to use the correct magnets for the assemblies you have on your trailer. Going with a magnet for a higher rated assembly will simply make the brake activation harder to control. They won't be any more powerful but they will be more touchy when adjusting the braking power. I would check the main ground for the trailer. This is the wire that runs from the trailer connector to the trailer frame and...
    view full answer...
  • How to Wire Trailer Brake Magnets
    As long as one of the wires coming from the back of the hub is a ground and the other is a power, it does not matter which wire on the magnet goes to which wire from the back of the hub. I have included a link to a video of a magnetic brake replacement video that may be helpful. It is for a different size brake, but you it shows the whole process.
    view full answer...
  • Replacement Brake Magnets for 1976 Terry Camper With Welded Backing Plates
    If you just need to replace the magnets then we do have these for you as the Replacement Trailer Brake Magnet Kit for 7" Brake Assemblies part # BP01-068 but if you need anything else then your only option is to install a new trailer axle, one that has removable backing pates. In order to see if we have an option for you I would need you to measure for me the distance between your hub faces and spring centers. If you can provide this then I can go about seeing if we have the correct replacement...
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  • Brake Magnets Needed for 2010 Surtrac Trailer with 5200 LB Axles
    I spoke with my contact at Dexter Axle and if there is any question regarding capacity, he recommends going with a magnet for a 7K axle brake assembly. The magnet is interchangeable so if you do indeed have brake assemblies for a 6K axle, it will still work for you. The magnet will be just a bit stronger but will not cause you any issues. Currently we offer 2 options when it comes to brake magnets for 12 inch x 2 inch brake assemblies. Trailer Brake Magnet, # BP01-180, fits: Dexter 12"...
    view full answer...
  • Which Magnets are Recommended for 12 inch Dexter Trailer Brake Assemblies
    Depends on the capacity Dexter axle you have. If your 12 inch drum axles are 6k rated the magnet you would need as a replacement is the part # BP01-180. If instead you have a 7k axle the correct magnet is the part # BP01-225.
    view full answer...
  • Is # BP01-225 a Replacement for # BP01-180 Brake Magnet
    According to my contacts at Redneck Trailer Supply, the less expensive BP01-225 is indeed an acceptable replacement for the BP01-180 brake magnets on your 12x2 Dexter brake assembly.
    view full answer...
  • Old Hayes / AL-KO brakes Replacement Brake Magnets
    The Replacement Trailer Brake Magnet for 12" Brake Assemblies # BP01-180 will fit old Hayes AL-KO brake Assemblies that are 12x2 inches. They fit 6K and 7K assemblies after 1988. For the 7.2K and 8K oval you would want the Trailer Brake Magnet For Dexter 12-1/4 Brake Assembly, White Wire # BP01-265 instead.
    view full answer...
  • Do Dexter Nev-R-Lube Hub and Drums Use the Same Brake Components as Other Dexter Hub and Drums
    The Dexter Nev-R-Lube Hub and Drums will use the same braking components as other Dexter Hub and Drums. You would just need to determine the size of the drum in order to determine which parts to use. The magnet you were looking at, part # BP01-180, is for 12 inch drums. The magnet you would use for 10 inch drums is part # BP01-110. Same principle applies for shoes and entire brake assemblies.
    view full answer...
  • Replacement Magnets for Al KO 3500 lb Trailer Brake Assemblies
    We have the part # BP01-110 which is the correct replacement magnet kit for AL KO 3,500 lb brake assemblies like you have.
    view full answer...
  • Will Going with a Higher Rated Brake Magnet Give More Braking Power
    Going to a "more powerful" magnet will not give you additional stopping power. All it will do is make your trailer brakes harder to fine tune as they will want to lock up easier. Your best option would be to stick with the proper rated magnets for your setup. If your brakes are weak and won't lock up that could mean that your magnets are worn and need replaced or your assemblies are out of adjustment. The easiest possibility is that your brake controller just needs to be adjusted for more...
    view full answer...
  • Will the Dexter # BP01-225 work as a Replacement part for the # BP01-180 or BP01-185
    According to my contact at Dexter, the Dexter # BP01-225 is rated for use on up to a 7K axle and it is intended to fit Dexter and Dexter Nev-R-Adjust brake assemblies. It has a larger profile and may not fit on Hayes/Alko brake assemblies. Where as the # BP01-180, is also rated for use on up to 7K axles, and it is considered a fit for Dexter and Hayes/Alko brake assemblies. The # BP01-185 is rated for use on up to 6K axles, and is considered a fit for Dexter brake assemblies. If you...
    view full answer...
  • Comparing Trailer Brake Magnets # BP01-225 and # BP01-180
    The Trailer Brake Magnet, # BP01-225, that you have referenced is designed for use with 12 x 2 inch Dexter electric drum brakes for 7,000 pound capacity axles. A similar magnet, # BP01-180, fits Dexter 6K, Alko 6K and 7K after 1988 (excluding centerline), and Hayes 6K and 7K after 1988 (excluding centerline) 12 x 2 inch drum brakes. Both magnets have 1 wire for ground, and 1 for power and it does not matter which wire is used for either function.
    view full answer...
  • Compatibility of 235/85-16 Tires With 16 x 6 Rims
    I checked with our resident tire and wheel expert, who tells me that a 235/85-16 tire can indeed be successfully used on a 6 inch wide rim. I wouldn't recommend going any narrower than that, though. I'll link you to our trailer tire help article that you might find helpful.
    view full answer...
  • Replacement Axle Recommendation For An Older 12"x2" Braking Assembly
    The reason you're having some trouble finding what you need is because you have a pretty old setup on your trailer and it is no longer used. With that being said, your best and easiest solution is going to be a full axle replacement. Since you have a 12"x2" braking assembly, you'll likely need an axle with a weight capacity of 5,200-7,000-lbs, however I recommend finding that out to be sure. Additionally, you're going to need to measure the hub-face-to-hub-face distance (A), as well...
    view full answer...
    Image 1 for Image 2 for Image 3 for
  • Electric Trailer Brakes Lock Up When Trailer is Plugged in to Tow Vehicle
    The easiest first step here would be to try the trailer on a different truck, and see if the same problem occurs. If the trailer brakes are free until the trailer is plugged in, I suspect that something is mis wired. I would suggest examine the wiring where the break away system was bypassed and make sure that the 12-volt accessory feed is not connected to the brake wire at some point. Are you by chance using a 7 to 6-way adapter? If so, there are two accepted ways of wiring a 6-way connector....
    view full answer...
  • Replacement Brake Assembly Magnets for a Dexter 8k Axle
    The brake assemblies that are on your 8k Dexter axles most would be the Dexter Electric Brake Assembly # 23-435, the replacement brake magnets for this assembly would be the Replacement Magnet Kit # BP01-301.
    view full answer...
  • Troubleshooting Trailer Brakes that Lock Up When Trailer Wiring is Connected
    What it sounds like is happening is that the 12 volt accessory circuit on your trailer wiring is being mistakenly wired to the brake output circuit either by a short or something being miswired. I would first start at the 7-way of your truck and using a circuit tester like part # PTW2993 check for voltage in all of the correct pins. I attached a diagram for you to use as a guide. Next, you can use a jumper wire from a 12 volt car battery to apply voltage on all of the different circuits...
    view full answer...
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