The engine is failing on many Nissan vehicles with the Nissan VK56VD (gasoline V8) engine. Cylinder 7 on the engine has significant scouring, and there is a Nissan Technical Service Bulletin (NTB19-057a) indicating this problem is widespread among 2017-2019 Nissan Armada, NV, Titan, and Titan XD models. This is a major safety concern. When there is a problem with the engine, the vehicle may stall, lose power, or even catch fire. If a driver loses the power from the engine while driving, or is unable to accelerate as expected, the vehicle could be at risk of getting hit, seriously injuring the occupants of all vehicles involved. The problem has been diagnosed, reproduced, and confirmed by Kline Nissan in Maplewood, MN. The vehicle was inspected by Kline Nissan. Diagnosis details attached, along with borescope photo showing significant scouring in Cylinder 7. Repair action is a new engine short block. My vehicle was outside the 60000 mile powertrain warranty window at the time of inspection. My service advisor at Kline Nissan contacted Nissan Consumer Affairs to submit a Factory Goodwill case, but was informed by Nissan Consumer Affairs that they would not be assisting in the replacement of their defective engine. The concern I share with NHTSA is the cost I was quoted to repair this problem is $9203.70. This problem is so widespread, among 3 years of Nissan's vehicles, I expect very few vehicle owners outside of the warranty window will be investing this level of repair in their vehicle. As a result, many of these engines to fail on the road, putting the public highways and roads at major safety risk. There are no warning lamps or messages for this problem, simply a tick noise that gets louder over time as the cylinder continues to get scoured, worn and damaged. This will eventually lead to damage significant enough to unpredictably blow the engine while driving which would be a major safety concern putting the vehicle occupants and others on the road at risk.

- Ham Lake, MN, USA

The vehicle abruptly lost reverse gear while driving on a public roadway. After approximately 3 hours of continuous highway driving, the vehicle was brought to a stop, placed into reverse, accelerated in reverse for approximately 100', and shifted back to drive. After subsequently coming to a stop, operator attempted to put the vehicle in reverse again but vehicle failed to engage the reverse gear. In fact the vehicle was essentially in neutral despite the gear shifter indicating 'R' gear. Again, the gear shifter would readily shift to 'R' but in fact no gear was apparently engaged as the vehicle would roll downhill as if it were in nuetral. Vehicle failed to proceed in reverse despite opening the throttle (I.e. 'giving it gas'). as far as we could tell the vehicle was able to shift to park and drive. The vehicle was able to proceed in drive. No excessive noises or vibrations were experienced throughout the duration of this incident. Owner called local Nissan dealership to report the trouble and later delivered vehicle to dealership. Dealership advised that it had contacted Nissan engineering hotline for direction how to proceed. Dealership stated Nissan engineering hotline advised replacement of transmission. Nissan Consumer Affairs refused to provide any assistance or consideration to customer except to rely upon extended warranty purchased by customer at original sales transaction. Dealership stated all labor and material were covered by warranty. This 4 year old Nissan SUV has only 1 original owner, has kept up with all scheduled maintenance performed by Nissan dealership, and has operated for fewer than 10,000 miles per year. Approximate mileage at incident is 38,200 miles. According to the dealership the make and model of the replacement transmission is jatco Corp. Re7R01B X100A.

- Round Rock, TX, USA

The transmission is shifting incorrectly at low rpms. I can clearly see the RPM fluctuating especially going uphill. This happens 30-50 mph.lack of power/acceleration. Feels like transmission is shifting in lower gears too sooner and and won't accelerate until driver pushes significantly. This is very dangerous especially making turns at stop lights.

- Winchester, CA, USA

The transmission is shifting incorrectly at low rpms. I can clearly see the RPM fluctuating especially going uphill. This happens 30-50 mph.lack of power/acceleration. Feels like transmission is shifting in lower gears too sooner and and won't accelerate until driver pushes significantly. This is very dangerous especially making turns at stop lights.

- Edina, MN, USA

While driving at rate of 45 miles per hour in the city of oxnard, ca in my 2017 Nissan Armada sl, the car started to immediately slow down to a speed of 5 miles per hour, which almost caused an accident. The antiskid and 4X4 lights and check engine light came on, but the car could not accelerate. I had to pull over to allow traffic to continue. After waiting for several minutes with the car off I restarted the car and then drove as normal. I took the vehicle to get looked at, but the technician couldn't determine the cause using diagnostic equipment. The car continues to drive normal, but then stalls and the same issue arises.

- Oxnard, CA, USA

The transmission on my 2017 Armada seems to shift improperly and even seems to shift prematurely causing a stall or loss of power to the vehicle. I've notice this as I'm starting to accelerate from a stopped position and it appears to happen sometime between shifting from 2nd to 3rd gear. This happens all the time while driving in town, on the highway, I've yet to notice any issues. I purchased this vehicle used from Buick/GMC in gilroy, ca. August of 2019. I failed to notice this issue when I test drove the vehicle.

- Salinas, CA, USA

Brake pedal switch failure for second time on a 2017 Nissan Armada. Because Nissan repaired this a year ago (mind you when my vehicle was only a year old and had to be towed from toledo) they will not cover the repair again because they have stated that it outside of the 12,000 miles, one year warranty on the part. Nissan has an issue with this switch assembly. The service technician noted that there were two other Armadas in for the same repair that week. This is not only a reputational issue but a safety issue. One of the main concerns with the switch is that it is not recognizing when you apply your foot to the brake!

- Canonsburg, PA, USA

From slow starts, the tachometer will flutter and that hesitation is transmitted through the drivetrain to the wheels.

- Eunice, LA, USA

2017 vehicle hesitated while leaving a drive through, would not shift from park. At next venue, the vehicle failed to start. Owner attempted to start vehicle with remote start. The engine turned on, however, upon entry when the owner pressed the start and placed foot on the brake, the vehicle shut off. The vehicle was then towed to the dealership where repairs were made to a stop sensor, however, the vehicle is still hesitating.

- Canonsburg, PA, USA

The new Armada for 2017 has a cold weather problem in its transmission. The problem is it doesn't shift properly. My dealer says that's the way it supposed to work to warm the fluid. But in the 40 years that I have been driving cold weather has never been a problem for transmissions. It stays in 2nd and 3rd gears way to long. Anyway that's my problem and there should be a solution, maybe a different transmission fluid or a different code to shift more quickly. An updates needed. This happens everytime you start from a stop until the car warms, about 20 minutes of driving. Nissan mileage could go up an additional 2 miles per gallon more if it didn't have such high revs during this warm up period.

- Millsboro, DE, USA

While driving, the transmission hunts and shifts very early, crippling acceleration. At normal highway speeds, significant depression of the accelerator is required to effect a downshift. This presents a safety hazard when acceleration is required for maneuvering. When the vehicle does shift into the next gear, significant oscillations occur until the transmission settles on a point. Also, at highway speed, the engine RPM continuously 'flutters' under constant accelerator position and no change in engine load (flat straight road). I have also noticed that when I slightly depress the acccelerator to maintain speed, the transmission responds by further reducing engine RPM again hampering acceleration (exactly opposite of any other automatic vehicle I have driven). This transmission operates as if it has air in the hydraulics. I have had the latest tsb installed for the ECM and tcm (revision E). Nissan does not appear to be capable of fixing this safety issue.

- Oswego, NY, USA

The transmission does not seem to shift in a normal manner it does not shift up when starting from a stopped position and seems to downshift un-necessarily. You can hear the engine working harder than it should since it's in a lower gear than it should be, and you can see it in the tachometer because it's running at a much higher rate. On one occasion I noticed the tachometer fluttering for 10-15 seconds while driving at a steady speed. All of the occurrences were on city streets. The problem does not happen all of the time as it could be a few days in between occurrences. I have been to the dealer twice already. They did notice the problem and updated the software, but the problem still exists. They claim they do not have a fix!

- Clifton Park, NY, USA

Sometimes when pressing the accelerator, the vehicle will act like it is trying to choke out and will shudder and/or hesitate. This can occur when trying to climb an incline or when merging into traffic from a slowed down or stopped standing. This can be seen in a shudder in the tachometer needle and feels terrible. There is great concern on my part that it will happen to do this at a moment that my children are with me and will cause me to be hit by another vehicle. The occurrence is unpredictable but is incredibly noticeable. I have been told by the dealership many times that this is normal and that no one else has reported a problem. I cannot imagine that anyone would buy this vehicle given how easily the problem is noticed. It is unnerving.

- Springdale, AR, USA

From slow starts, the tachometer will flutter and that hesitation is transmitted through the drivetrain to the wheels. This hesitation has been seen around all shift points and has been confirmed by service technicians. Nissan does not have a fixed at this time. The condition represents a hazard on icy roads' it caused me to leave a lane due to slip. A video of the tachometer is available on request.

- Niles, MI, USA