Which parts fail
Components named in complaints (automatic emergency braking, adaptive cruise, lane keeping, backup camera).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2021 Nissan Sentra owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2021 Nissan Sentra. The contact received notification of NHTSA Campaign Number: 23V628000 (Back Over Prevention) however, the part to do the recall repair was unavailable. The local dealer was contacted, and it was confirmed that the part was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact experienced the failure and stated that while the operating the vehicle, there was a clicking sound while making left turns. The vehicle was driven to the local dealer who determined that the front passenger's side and driver's side tie rods were cracked. The failure mileage was 60,000. Parts distribution disconnect.
The contact owns a 2021 Nissan Sentra. The contact stated that while driving approximately 30 MPH, the instrument panel went black. An unknown warning light then displayed and the vehicle abruptly stopped in the middle of the road. Immediately after the failure, the vehicle started driving as intended. During the failure there were no other vehicles or objects nearby. The vehicle was taken to the local dealer who replaced the distance sensor however, the failure reoccurred. The vehicle was taken back to the dealer. No further information was available. The manufacturer was also notified of the failure. The failure mileage was 5,800.
The contact owns a 2021 Nissan Sentra. The contact stated while driving at an undisclosed speed, the automatic emergency braking system engaged while there were no nearby vehicles or pedestrians. The contact stated that the failure recurred several times while driving. Additionally, the contact stated that the message "System Malfunction" was displayed. The vehicle was taken to the dealer several times; however, the failure could not be replicated. The vehicle was not repaired. The manufacturer was made aware of the failure, but no assistance was provided. The failure mileage was approximately 200.
Steer rod recall effective as of 6/17/21 yet ignored by enterprise rental car company. Lost control, car hit guard rails. No cooperation from insurance nor rental company. Police got it Towed on 1/26/2022 to alpine automotive, lake Zurich illinois, enterprise holdings picked it up on 1/28/2022. No other information provided by any party on estimate of damages, nor medical coverage due to "insurance policies"
The contact owns a 2021 Nissan Sentra. The contact stated that while his daughter was driving 35 MPH, the vehicle experienced phantom braking. No warning light was illuminated. The vehicle was not diagnosed nor repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 11,382.
The automated break system came on while I was driving 2 times within 3 days without anything being in front, the back or on the side of the car. When this happened there was a few beeping noise and a quick red flash on the dashboard that said maintenance.This started happening the next day after getting an oil change from the Nissan dealership. My safety was at risked because when the car suddenly and unexpectedly stopped it jerked my body forward causing my neck to become sore. This can cause greater injury or worst if I was going any faster. If someone was behind me it could cause them to crash into me which would be doing the opposite of the purpose of the safety feature. I took the car in to the dealership and nothing could be done because there wasn't a code and it didn't happen in the presence of the mechanic. …
AEB system is initiating emergency braking at random times. Both on surface street, and the freeway on ramp. With and without weather, and without any obstacles or cars in the way. The vehicle comes it a complete stop when this happens and puts the driver in significant danger. At this point the dealer observed warning code on the dashboard, but it did not engage. Message relating to that the AEB may deploy. When it does happen Emergency Brake is on the dashboard. After it happens vehicle can resume driving. Various indicines happened last year. We took it to Ken Garff Nissan (11155 So. Jordan Gateway in South Jordan, Ut. 84095. They could not find the problem or get the problem reproduced. They recommended turning off the safety features when driving. We have done that for a year. …
My 2021 Nissan Sentra has experienced multiple false Automatic Emergency Braking (phantom braking) events where the vehicle suddenly applies the brakes despite there being no vehicle, pedestrian, or obstacle in its path. This issue occurred before and after my vehicle was serviced by AutoNation Nissan Chandler on June 12, 2026. Despite recent dealership service, the problem continues to occur. The unexpected braking creates a serious safety hazard because it can cause the vehicle to slow or stop unexpectedly in traffic, increasing the risk of a rear-end collision or other accident. I am also concerned that these repeated sudden braking events may be causing excessive stress or premature wear to vehicle components such as the engine mounts, suspension, and struts. …
When the sun is out and there is no clouds obscuring the sunlight my vehicle has night time lights running, dimming the interior of my car making it difficult to see the speed and other dashboard requirements while perfectly bright and sunny outside and 0800AM as well as 1500PM. This has been going on for two months and I took it in to two dealerships. One told me check your manual and the other went further and told me "by Nissan standards it is functioning normally." This doesn't make sense to me as the sun is out, it isn't dark or dim and yet when on automatic lighting my Night lights, not my normal running lights,,are on and causing me unable to see what's on my dash. Also whe. …
The competent that continues to fail is the emergency response breaks. They continue to stop at random times creating a very unsafe environment while I drive daily. I do have this on video and my car is available for inspection at any time. I just recently finally got the emergency break system on video since it is so random and plan on making an appointment with my local Nissan Dealer. I did have a visit recently regarding the recall for the tire rods. My car continues to make odd sounds and I paid over $1000 to get it fixed with all new tires. These problems have began since the day I got my car. I have bought over 10 wheels due to issues with the tire rods. …
Related recalls
Back over prevention › Sensing system › Camera
Nissan North America, Inc. (Nissan) is recalling certain 2019-2021 Altima and 2020-2021 Sentra vehicles. Damage to the camera harness can cause distortion or loss of the rearview camera display image.
Remedy: Dealers will inspect the rearview camera and harness for damage and replace them as necessary. If no damage is found, the dealer will apply protective tape and reroute the rearview camera harness.
Collision Avoidance complaints in other Sentra years
Frequently asked questions
How common are collision avoidance problems on the 2021 Nissan Sentra?
NHTSA has 43 complaints about the driver assistance of the 2021 Nissan Sentra, 33% of the model year's 132 complaints. The component named most often is automatic emergency braking (29 mentions).
Is there a recall for 2021 Nissan Sentra collision avoidance problems?
Yes — NHTSA recall 23V-628 (camera, Sep 8, 2023). Recall repairs are free at authorized dealers.
At what mileage do 2021 Nissan Sentra collision avoidance problems start?
Half of the complaints with a recorded mileage happened before about 11,000 miles, and 75% before 25,000 miles.
Is it dangerous?
Owners linked 2 crashes, 0 fires and 3 injuries to driver assistance problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.