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No. In Nissan terms “replaced” is pretty much meaning superseded. That’s the old number.
Hello I had a great day, the BCI Malfunction has been fixed. Three things; replace BOTH switches on the break pedal, break switch and cruise switch. Also go to the two sonar boxes in the rear of the vehicle, they are off set in the rear end. Lightly knock on the area around it and see if rock and debris falls out. Also look for the boxes and make sure they are not covered in mud. If the are clean them gently. Lastly, one note in the manual, make sure all of the air in your tires is correctly filled, strange but it say the BCI can malfunction if the are under inflated. Good luck but I'm hyped, right now the car actually drives and breaks better and the collision warnings are working properly. BTW this only cost me a little over $100.

Hello I had a great day, the BCI Malfunction has been fixed. Three things; replace BOTH switches on the break pedal, break switch and cruise switch. Also go to the two sonar boxes in the rear of the vehicle, they are off set in the rear end. Lightly knock on the area around it and see if rock and debris falls out. Also look for the boxes and make sure they are not covered in mud. If the are clean them gently. Lastly, one note in the manual, make sure all of the air in your tires is correctly filled, strange but it say the BCI can malfunction if the are under inflated. Good luck but I'm hyped, right now the car actually drives and breaks better and the collision warnings are working properly. BTW this only cost me a little over $100.
Also the old switches replaced were blued (high heat) and burnt, obviosly a fault in the switches design and function.
 

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Sorry to revive an old thread - my 2018 is doing this and will reset with a key cycle... sitting at dealership now. Anybody have any resolutions to post?



So, I left out one detail that also started happening when the BCI Malfunction started - The truck would occasionally only go into ACC mode when we would try to start. The BCI issue was occurring at least once a day.

Apparently, they found that the brake switch was bad,so they replaced it. And, it's been over a week and about 1600 miles (road trip) and no more codes..



For reference, here is the part # for the brake switch that was replaced - 25320-AX-10A SWITCH ASSY-STOP
Sorry to revive an old thread - my 2018 is doing this and will reset with a key cycle... sitting at dealership now. Anybody have any resolutions to post?



So, I left out one detail that also started happening when the BCI Malfunction started - The truck would occasionally only go into ACC mode when we would try to start. The BCI issue was occurring at least once a day.

Apparently, they found that the brake switch was bad,so they replaced it. And, it's been over a week and about 1600 miles (road trip) and no more codes..



For reference, here is the part # for the brake switch that was replaced - 25320-AX-10A SWITCH ASSY-STOP
hi Todd, thanks for your post. I am experiencing the same issue with both the BC I malfunction and the brake switch. I’m wondering if replacing the brake switch solve the BCI malfunction for you?
 

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hi Todd, thanks for your post. I am experiencing the same issue with both the BC I malfunction and the brake switch. I’m wondering if replacing the brake switch solve the BCI malfunction for you?
Replace both the break and cruise switches, check the sonar boxes for debris and inflate tires to spec. Read above it worked for me no more issues.
 

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My 17' Armada started doing the same thing four weeks ago and has been very intermittent. Because some have had luck with the brake switch I ordered one:

Part No.: 25320-AX10A
SWITCH ASSY-STOP LAMP

from Nissanpartsdeal along with the cruise control switch:

Part No.: 25300-AT30A
SWITCH ASSY-ASCD CANCEL
Replaced by: 25300-3RA0A

The OEM stop lamp switch installed in my vehicle (I have owned my Armada since new) was indeed manufactured by Valeo and was all black in color. The replacement part I ordered was black and green in color. I have replaced the switch and will see how it works. After reading through this thread I don't have a lot of faith that it will be fixed for good. Based on some posts I wonder if there could be an issue with the position of the switch in the vehicle based on the plastic piece that holds the switch in place. That could be flexing/moving over time and causing a similar issue to an intermittent contact in the switch. I have not replaced the cruise control cancel switch yet because I want to see if changing the brake switch makes any improvement at all.

My only ask in here is some posters are coming into this thread, posting that they have had some success with their dealer but then not following up with what actually took care of the problem (if anything). Please take a minute to post a follow up with an explanation of what the dealer did do to successfully repair. I will definitely post my DIY experience because my vehicle has 46K miles and is now out of warranty. I like it too much to just trade it off yet. We shall see.

Update: Almost two weeks now since I replaced the Stop Lamp Switch Assy. with the part I listed above. Prior to replacing it my Armada was having the BCI malfunction on every drive even if it was only a few miles. So far it has not returned. Will keep updating this post as time goes on.
Updating my post again. It's been nearly 3 months and just over 10K miles of driving with no BCI Malfunction error. Just replacing the stop switch on mine took care of the error completely. If you have this error definitely replace that switch first. I did order the cruise control switch (ASCD CANCEL) but did not replace it yet.
 

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I recently encountered an issue with the BCI system where it was indicating that "BCI warning system unavailable". I took it to the dealership to have them check it out. The system had started working properly again prior to arriving at the dealership, but the tech indicated that they pulled a code "C1B55" radar blockage right rear. They suggested that the vehicle undercoating process may have coated the radar sensors causing an issue. Does this make sense? I have had the vehicle sprayed each year with the "Corrosion Free" rust check system since it was purchased new in 2018 (currently has 30K kms on it). The tech said that he blew air inside the rear fender but would have to remove the bumper covers to clean the sensors if the issue continues. Would the rust check process have an impact on the radar sensors?
 

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Today while I was driving suddenly the BCI malfunction light came ON. I had to turn the engine off and fire it up again to make it go away. Anyone have this come up? Not sure why it popped up. Backup camera and sonar is functional.
I've had it happen twice, both times it has been a bad brake switch. Must be a bad designed switch.
 

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I recently encountered an issue with the BCI system where it was indicating that "BCI warning system unavailable". I took it to the dealership to have them check it out. The system had started working properly again prior to arriving at the dealership, but the tech indicated that they pulled a code "C1B55" radar blockage right rear. They suggested that the vehicle undercoating process may have coated the radar sensors causing an issue. Does this make sense? I have had the vehicle sprayed each year with the "Corrosion Free" rust check system since it was purchased new in 2018 (currently has 30K kms on it). The tech said that he blew air inside the rear fender but would have to remove the bumper covers to clean the sensors if the issue continues. Would the rust check process have an impact on the radar sensors?
If the tech was able to pull that specific code than yes, I would assume whatever it is you are having sprayed on the underside of the vehicle could have covered up that sensor and thrown the code. If they clear the code, clean the surface and the error comes back again you could have another problem with a sensor failure not related to the coating you had applied.
 

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If the tech was able to pull that specific code than yes, I would assume whatever it is you are having sprayed on the underside of the vehicle could have covered up that sensor and thrown the code. If they clear the code, clean the surface and the error comes back again you could have another problem with a sensor failure not related to the coating you had applied.
Thanks for input. The rust check spray was completed back in November but am just having an issue now. One would expect that if it were that, it would have caused issues right away. Will see if the code comes back or have any further issues.
 
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