Brake Sensor problems of the 2018 Nissan Altima

The automatic emergency braking (aeb) system stops working. The dashboard message says the front sensors are being obstructed but they are not. This seems to be a widespread issue with this sensor on Nissan vehicles.

Since I purchased this 2018 Altima (I had previously driven a 2016 Altima without aeb), I have gotten false positives from the front sensor, stopping my car at random times in clear day light traffic, on dry pavement, with no leaves or other road debris. Front sensor has continuously reported the "front sensor not available" alert multiple times in my cars short lifetime, followed by the crash icon at random times of the days, and all speeds including in the stopped position. The sensor goes out regardless or whether there are other vehicles around. I reported these issues beginningin October 2018 (the same month I purhcased my car). No Nissan vehicle should be equipped with the technology where driver's had no clue when the vehicles will come to a halt and lock without warning. This commonly happens when there are cars around me and there is a change in speed (anticipated or nto), which is common in la. My front sensor has malfunctioned several times and engaged the brakes, several times while driving on the freeway at 50mph. My car also seems to lug at times when I brake from a distance and normally which concerns me. I have reported this issues to technicians and had the brakes checked with no problems found so I have had no choice but to wait for the issues with my brakes and car to compile. The owner's manual admits aeb systems do "not function in all driving, traffic, weather, and road conditions" but the manual leaves out the part about how the systems can cause vehicles to suddenly stop even when no objects are in the driving lane. I originally reported this issue to steve yaeger on October 19, 2018--the same month I purchased the vehicle. Have brought in my vehicle into to Nissan various times in the first 3 months but technicians always told me there is nothing they can do and just shake off my concerns/try to give explanations.

2018 Nissan Altima sl while driving in rain the message �front radar unavailable due to obstruction,� appears. Vehicle begins to shake and the back brakes engage without touching them. Vehicle tries to hydroplane. Vehicle slows to approx 35 or 40 miles per hour. It feels like the back passengers wheel is locked up. I have owned this vehicle for 7 months. The aeb sensor has been replaced. This problem has happened 3 times since the replacement. Always while driving in the rain.

After 10 min of operation and at a regular speed in a frw 55 mph the collusion sensor comes up stating that there is no warning if a car is too close to the front of vehicle. Cruse control doesn't work and appears that works with the collusion sensor.

Radar sensor for aeb and fcw malfunctioning, turning off at random situations, braking when no vehicle is near, false alerts crossing rail road tracks, etc. Took to Nissan dealership under warranty but issue was not fixed since they claim to be because of potential prior crash. Vehicle has not been reported in a crash, and aeb is malfunctioning constantly to the point where it may be unsafe instead of a safety feature.

A warning in the dash that says, �front radar unavailable due to obstruction. � the vehicle does this while in motion. The vehicle has 52190 miles on it at this time. The warning will reset when turning off the car and restarting. There are no items obstructed. Nissan dealership stated very common and replacing a lot of them. $1200 is the cost of repair quoted and the service advisor knew that without looking it up. This has to do with the radar sensor that is used for the automatic emergency braking system.

While driving on the highway, during the morning, my car activated the brakes on its own, this is the second time this happens the first time I took it to the dealer and asked for the sensors to be removed, and kept it for a whole day and apparently nothing was done, secondly the (front radar obstruction) is becoming annoying. Another of the issues I encountered with this my Altima is the shifting, from 2nd to 3rd gear it feels as if the gears were stuck, also took it in the dealer and they said this could not be true because my Altima doesn't have a regular transmission it has a band, so I responded, you know more than me, just please make a note of my issue and I don't want to be stuck with a lemon, I am sure I'm not the only one that has encountered these issues.

While driving a sensor light appears and reads obstruction unavailable and stays for several minutes before turning off this happens at least 5 to 6 times a week. Another problem im having is a knocking sound under driver feet while driving and turning I took it in to have it checked and the technician drove it heard the sound kept the car a whole day but said he couldn't find anything wrong but clearly there is a problem if he and I hear can hear the noise. When I picked the car up it still makes the same sound and I'm afraid while driving something may happen to the wheels. It sounds to me like this is a rotor problem. I've taken the car in twice regarding this same problem and it has not been fixed. Since purchasing this car it has been in service at least 10 times with different problems 3 times for brakes, one time for not being able to push brake to start two times for excessive wind noise from windows had front and back brakes replaced twice and now having to take it back to replace window seals and knocking noise that has not been fixed. Nissan really did a poor job building the particular car not even two years from purchase with several problems very unsatisfied customer.

2018 Nissan Altima has a defective push start and braking system. Unable to start car with push start because it feels as if the brakes are stuck. Have to continously pump the break in a effort to get the brake to release in order to start the car. There is also an issue with the front radar sensors. I while in motion I randomly receive an audible alert and warning message saying that the front radar is unavailable due to obstruction yet there would nothing in front of the car.

The forward collision warning component becomes �unavailable� when there is nothing (no dirt or rain, snow) blocking the sensor. I keep the sensor wiped clean and on a nice sunny day, while vehicle is in motion on the highway, boulevard, residential streets. The sensor warning will tell me �fcw unavailable� with the �symbol� of two cars crashing. It goes on for a while then off then back on again. In the photo below, I'd just pulled over to take the picture of the symbol. (this was 08/20/19. 10 days after my car purchase 08/10/19) at that time the symbol only is showing. I'd just turned off the boulevard from driving 40mph. Can't get a pic of message while car is in motion, of course. This is now a regular occurrence for the 3 months I've had my car. Taking into mechanic to get it checked end of November 2019. This warning occurs at various speeds.

I have 2018 Nissan Altima sr special edition with about 25,000 miles on it. For the past few months the indicator front radar unavailable due to obstruction has been going off constantly. Last night when I was coming home from work on a major highway the indicator came up and shortly after the blinking yellow indicator of a car came up and started breaking by itself, twice. The first time I was traveling about 75 mph and the drivers assistant started breaking. There was not a car in front of me or around me at all. I pulled over immediately and saw nothing in the way of the sensor. The second time it happened probably about 10 miles from the first time it happened. Then, I turned off the �drivers assistants�. This could have been a very bad accident if there was another car around me at the time. I took my car in this morning to the dealership I bought the car from. The service girl who I deal with every time I go to the dealership for service. Got my car right in and found out the sensor was bad and it needed to be replaced and got me into a loaner vehicle because I needed to go to work and couldn't wait. I'll be picking up my car tomorrow and hoping this won't happen again!! Nissan you should issue a recall on the matter right away. Obviously by reading other consumers issue they are the same as mine and that is why I am writing this review!.

The front collision radar sensor keeps going off and on. Took into dealer and said it was a very common problem and don't know why it is not recalled yet. The part is $1500 which is over 10% of the vehicle. This is a safety issue as I do not know when it is on or off. The the sensor goes off stay front sensor is unavailable due to obstruction and there is nothing there. It will turn off and on several times in a drive.

I bought my 2018 Nissan Altima sr midnight edition around October 2018. When I reached about 8,500 miles the cars front radar sensor went off, and my Altima would say front radar unavailable due to obstruction, and this would go on and off the whole week. I called the dealer and they told me to come and we'll take a look at it. That week I went to the dealership and they told me that it's cover by warranty and that the front radar sensor needs to be recalibrated. Waited the whole day for them to fix it. When I left the dealership 10 miles out the front radar went off again, and I was fuming that my new car is doing this. I called back and told the that the sensor is doing the same thing again. They told me that they will order and new sensor for you and will fix it when the part arrives. Two weeks later the dealership never called or emiled me. I call them up and they said that the part is here and to bring the car in anytime. So I go in to the dealership and they changed the part. Day 1 was good no issues. Day 2 was good no issues. Day 3 the cars abs system kicks in and brings my car to a full stop for no reason what so ever. There was no car in front of me, no pedestrians nothing. The weather was a clear sunny day and I driving in manhattan with a client in my car going 25 mph. The whole car was shaking I heard the tire skid and the whole car was shaking, I got soo scared. The car behind me almost hit me and the guy comes out his car arguing with me on why I stoped suddenly for no reason. I told him it wasn't me the car stoped on it's own, but he didn't believe me and gave me a couple cuss words. I was in rage, and scared at the same time. I called the dealership again and told them the issues, they told me come in and we'll look at it for you. Im so angry because I could have been in an accident form the same thing that is supposed to prevent an accident.

The front radar aeb keeps going out, almost the reason for my vehicle to not stop in an emergency situation. This feature was the complete reason I bought it now I feel like it is dangerous. I am considering asking for complete buy out of my loan. I have taken the car back 3 times in 3, Nissan has no answers other than keep replacing faulty sensor with more faulty sensor.

During random driving the forward collision sensor comes on stating that forward collision is unavailable. Sometimes the sensor will go off 1-2 times or up to 6 times in one day. This sensor controls the (aeb) automatic emergency braking. Nissan has acknowledged this issue in several cars but no recall has been issued. This vehicle is my work vehicle and my personal Nissan pathfinder has already had the part replaced with less than 10,000 miles. Currently my vehicle is out of warranty and they want $1700. 00 for repair of faulty safety parts. I've been driving in perfectly sunny days, on bumpy back alley, just driving on the highways and the sensor goes off. I believe that this issue is more widespread than they acknowledge. Our fleet of company cars are experiencing the same problem with the rogue, Altima.