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Replacement Breakaway Switch Pin for Demco SBS Supplemental Braking Systems

Replacement Breakaway Switch Pin for Demco SBS Supplemental Braking Systems

Item # SM99905
Our Price: $14.26
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Replaces the pull pin on the breakaway switch that came with your Demco SBS Air Force One (SM99202 or SM99243) or Stay-IN-Play Duo supplemental braking system (SM99251). 1-800-940-8924 to order Demco accessories and parts part number SM99905 or order online at Free expert support on all Demco products. Great prices and Fastest Shipping for Replacement Breakaway Switch Pin for Demco SBS Supplemental Braking Systems. Accessories and Parts reviews from real customers.
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  • Reviews (210)
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  • Videos (2)
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Demco Accessories and Parts - SM99905

  • Tow Bar Braking Systems
  • Pins
  • Demco

Replaces the pull pin on the breakaway switch that came with your Demco SBS Air Force One (SM99202 or SM99243) or Stay-IN-Play Duo supplemental braking system (SM99251).


  • Replaces the pull pin on the breakaway switch that came with your Demco SBS supplemental braking system
  • Works with Air Force One (SM99202 or SM99243) and Stay-IN-Play Duo (SM99251)

16030 Demco SBS - (Formerly SMI) Replacement Break Away Plug for Air Force One or Stay-IN-Play Duo Supplemental Proportional Braking System

Replaces Demco SBS SM99905

Video of Replacement Breakaway Switch Pin for Demco SBS Supplemental Braking Systems

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

Video Transcript for Demco SMI Supplemental Braking System Replacement Breakaway Switch Pin Review

Jake: Hey, guys. It's Jake here with etrailer. Today we're going to be taking a look at the replacement pin for your SMI braking system.In our case here, we had a customer who had a breakaway, and the tow vehicle had separated from the towed vehicle, and he lost the breakaway pin. So, he's picking up a new one. To replace this, you just slide it back in and replace your cable. This is very important to have, because otherwise, your system's not going to work.You want to make sure you keep your pin in good condition, so whether that's you've lost one, you've broken one, or it's just gotten older and brittle and you need to replace it.

It's a simple and small enough part to keep on hand for those longer trips, so you might want to go ahead and pick up a couple of them when you get your system or when you get a replacement.Then of course before you leave, you want to make sure you hook up your safety cable and you're ready to hit the road. With that being said, that's going to do it for our look and installation of our SMI replacement pin.

Customer Satisfaction Score:

Customer Reviews

Replacement Breakaway Switch Pin for Demco SBS Supplemental Braking Systems - SM99905

Average Customer Rating:  4.9 out of 5 stars   (210 Customer Reviews)

Replaces the pull pin on the breakaway switch that came with your Demco SBS Air Force One (SM99202 or SM99243) or Stay-IN-Play Duo supplemental braking system (SM99251).


It’s exactly what I needed to have for my Demco braking system.



I bought this breakaway pin for my vehicle when it is not being towed to keep dirt and sand out and it fits perfectly.


This is not my first order from etrailer. Etrailer always seems to have what I’m looking for, they price fairly, they ship almost immediately and deliveries arrive on time or earlier. I’m a fan.


Ordered pin for Emergency Break away for our Toad vehicle as a spare it was exactly what was needed.


This item works fine. but the price about doubled from the last time I purchased one. There is a real problem with these getting stolen.





Reliable system.


Replacing our old breakaway switch pin which, while never used in anger (breakaway) had frayed wiring from getting dragged on concrete at one point. Worked as advertised, easy to reinstall new pin, delivery on time.


Exactly what I needed. I wanted to keep a spare handy just in case.....!
I've never had a problem with etrailer. Always the right product, quick shipping and great service!


While I hope I don't ever need this, I'm happy that etrailer has these … ordered my "spare" on Tuesday, delivery a few days later on Friday.


Fast service - great prices - excellent inventory. And technical support to top it off.


Nice to have as a backup. Fortunately have not had to use.


It does exactly what it's supposed to do. Very happy with it.


It is an exact replacement for the one I have. I bought it as a spare if the original got lost.



Everything is great. Havent needed to use it yet but it is still a great insurance knowing I have it to replace the original if needed.


Easy transaction, fast shipping.


The product is a perfect match for the stay and play braking system. Like everyone else I was apprehensive at someone stealing the unsecured original and leaving us without brakes. I’m not thrilled that if it does get stolen and the toggle switch inside the side gets accidentally turned on the brakes will fully apply.
Seems a liability so having a back up makes sense to me and most everyone else.



Update: if your tow car has a standard transmission with hill brake assist do not adjust so much that the hill brake assist comes on. It doesn’t release quickly enough and your tow car brakes will lock up for a scary second or two


I ordered the Break away switch pin. It arrived quickly and was exactly what I ordered. I use it as a back up. However, I did test it to make sure it would work for my Stay and Play braking system for my tow vehicle.


Part fit well on my Blue Ox breakaway switch. I tested to see if worked. Performed as designed. The cable attachment looks kind of funky. I replaced it with a small clevis.





A great backup part in case someone needs one asap!


This part I ordered was deliver quickly and was exactly what I ordered I definitely will use this site again!


Fits and works as described.



Great product, still using it and it continues to perform just as it did the day I purchased it.


Perfect replacement at great price.


The part was exactly what I wanted. It was easy to find and order on the etrailer website. The items were shipped timely and communication from etrailer was outstanding.


I ordered an extra breakaway pin to keep as back up after installing a Demco Stay-in-play brake system I am very pleased with the Demco brake system and also with the prompt and accurate service provided by in providing the breakaway pin. Great service. Thanks.


We bought this as a "spare" for our Jeep. We didn't want to find ourselves out traveling cross country and the original one breaking or being taken as a prank while we were stopped somewhere.

Without this device we would be forced to wait until we got a new one or option 2, we'd have to unhook the Jeep and drive the vehicles separately.

We tested the device to make sure that it was identical to and worked like the original and it did. We now store it in our RV in the event that we need it.

This is one of those devices that is like having an insurance policy - very much worth having should the need arise.


If you have a toad rigged up for flat tow and you have the braking system brand that uses this type for the safety aspect, I would recommend you get extras. For some reason people like to pull these out which would lock your brakes. Then you will have all kinds of fun getting moving again.

Product was exactly as described in the online data. Delivery per selected shipping method. Extras not available in my geographic area. etrailer had it! They have everything!


Awesome service by these folks. Thank you for providing quality customer care!!

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Info for this part was:

Employee Jackie C
Expert Research:
Jackie C
Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Kathleen M
Installed by:
Kathleen M
Employee Jacob H
Installed by:
Jacob H
Employee Laura H
Written by:
Laura H
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F

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