Bought vehicle 7 days ago. No significant problem. Actually very pleased. Touched brake to stop for light, the brake pedal traveled further than usual. Left light touched bakes to make a turn and brake light came on inside, pedal traveled further. Very carefully drove the next 1.2 miles to my house, brake light remained on touched brake which traveled further, I quickly pumped the brakes to enabled pressure which I felt was lacking and pulled into yard. I added like less than a shot of brake fluid. Brake light is out. Checked all four calipers, no leaks at connections. Checked all visible lines, no leak. No leak at master cylinder or power booster was detected while under applied brake pedal.

The brake light randomly turns on. When trying to brake there is a very loud grinding noise (metal on metal). The noise is scary and the brakes work but not as well (You hit the brakes, but you keep going). So I take the Nissan Armada to the dealer for repair and it's going to cost me $2,500. We started at $300, than it went to $1,700 and now we over $2,500. (The dealer is going to replace the brake booster and than re-program the unit)

When I checked online, I could not believe the number of complaints regarding the brakes on the Nissan Armada. There was a class action lawsuit:

Nissan Agrees To Settle Delta Stroke Sensor Brake Defect Lawsuit ...

www.carcomplaints.com/news/2014/nissan-delta-stroke-sensor-brake-lawsuit.shtml

Dec 17, 2014 - Owners claim Nissan Armada, Nissan Titan and Infiniti QX56 vehicles ... that allegedly can cause brake failure in about 350,000 older vehicles. ... delta sensor was bad and the brake booster assembly needed to be replaced.

We had just driven to Memorial Day vacation and the brake light turned on when we were about 36 streets away from our final destination. I coasted that far because I knew the car could be stopped and it was a similar problem that had happened before. The next morning it was towed to a local repair shop that could find nothing wrong. Drove 4 1/2 hours home. No problem.

Took it in last night to my regular repair shop because I just didn't feel comfortable with the diagnosis. They said everything looks good - brake wise. They were digging for information and it may actually be part of a lawsuit that was filed in December 2014. I just had it towed to the local Nissan dealer and they tell me they have heard nothing about the lawsuit and are making sure I understand that I have to pay the fee they charge to inspect the car. Fingers crossed it is part of the lawsuit and they will just replace the sensor in the booster that I'm reading about online - everywhere - yet they know nothing about it. :( Feeling frustrated...www.carcomplaints.com/news/2014/nissan-delta-stroke-sensor-brake-lawsuit.shtml

Update from May 28, 2015: ...car is still in the shop. Just called me back, it is the brake booster which is the delta sensor which is part of the lawsuit filed in California. We're at $1293 plus the $120 probably for them to "diagnose" it...which I already did.

Yesterday I was driving our 2006 Nissan Armada to the gas station a few blocks away from our house. I heard an awkward noise as I pulled out of the driveway at the gas station and thought that was strange. Two blocks down the road I pressed on my brakes to slow down and make a right turn, when I heard a clacking sound, my brakes did not work, and my brake light turned on. I was scared, this came out of nowhere. I was going slow enough and managed to make the right turn and coast along the curb. I coasted home without any brakes using my emergency lights and driving alongside a curb just in case. Later that evening I turned the car,change the parking location. The brake light was not on, I pressed on my brakes while in the parked position and everything seemed normal.

I am terrified of driving my car. I feel that I was lucky that I was not in lots of traffic, that I didn't run someone over, or worse yet that I was not going through a busy traffic light. I'm glad my grandchildren were not in the car with me. I need my car but I am afraid of the brakes going out again.

I called Nissan and they acknowledge that there is a problem with the brakes. I was told to take it in for a diagnosis and they gave me a case number. I have to pay for the diagnosis. We'll see how it goes.

Bought this SUV Aug 2006 w/25,000 miles. Brakes went out while I was driving during the second year. Brake light came on, and when I tapped the brakes it sound like metal rubbing against metal. I pulled over shut the engine off few seconds. When I restarted it, the brakes had reset themselves. Thought maybe some dirt got in the brakes or something. Mechanic could not find problem. Happened again about 6 months later, then again several times again over this 7-year period that I've owned the vehicle (usually within 5/6 months).This weekend alone, my brakes went out 3 times (replaced rear pads approx 3 months ago), this is scary now and there is definitely a problem. I've had the rotors replaced twice within a 2 year period (last time was less than a couple years ago) I even got upgraded pads when brakes changed, which leads me to believe there is a mechanical defect. During this time period I called Nissan couple times and confirmed there where NO recalls. Nissan Service Rep also advised me it that sometimes it just a sensor (same thing my regular mechanic said) until it happened repeatedly this weekend. My mechanic pulled up a code C1179 'ABS Control module-problem unidentifable'. I am now making an appointment for Nissan to look further into this problem. Coincidence?? Yesterday, a complete strranger walked up to me to inquiry about my experience with this SUV. She was thinkiing of purchasing one for her mom who loves the Armada. I gave it great review and I advised her of the issue with the brakes. As I started to explain, she interrupted and said "the brakes reset themselves when you cut the engine off and restart it". That really puzzled me. I asked how she knew. She said there was a recall. I have researched and NEVER saw a recall. I am online searching now.