2021 Nissan Altima — Known Issues & Recalls

Your key fob and electric door locks don't work, and you've had to replace the door actuators on multiple doors (rear passenger, rear driver's side, and driver's side). You mention this is a safety concern because you can't access your vehicle in an emergency. You've found that other 2021 Nissan Altima owners have reported the same issue. The repair is expensive and may involve replacing faulty door lock actuators or addressing the electrical control system.

You discovered a mileage discrepancy on your 2021 Nissan Altima after purchase. The odometer showed 35,189 miles when you bought it from the dealer, but when you went to register it, the actual mileage was found to be 65,543 miles. This suggests the odometer reading may have been tampered with or incorrectly displayed at the time of sale. You'll likely need to contact the dealer and potentially pursue legal action or request a refund based on odometer fraud.

Your backup camera has become progressively darker over the past month and now displays glitches with lines, freezes, or goes completely black. You've researched and found that 2021 Nissan Altima backup cameras have been subject to recalls in the past, though your specific vehicle hasn't been included. Since this is a known model issue and affects your safety when backing up, you believe this should be recalled and repaired at no cost to you.

Your car's braking system is applying the brakes suddenly and forcefully on its own while you're driving, even on highways, without any input from you and without warning. This has been happening repeatedly since 2021 despite multiple visits to authorized Nissan dealerships, creating a serious risk of being rear-ended or losing control of the vehicle. The fix will likely require Nissan to diagnose and repair the forward collision avoidance system and/or braking system components that are causing the unintended brake engagement.

Your Altima's Automatic Emergency Braking system malfunctions frequently because the front radar sensor gets easily blocked by dirt or weather, causing it to falsely detect obstacles and slam on the brakes when the road is clear. This sudden braking can cause other vehicles to rear-end you, and you've had to disable the safety feature entirely to avoid these false stops. Nissan has acknowledged the issue but offers no permanent solution or recall.

Your door locks have stopped working automatically. The passenger rear lock failed first, followed by the driver's rear lock, and now both front locks won't lock or unlock when you use the buttons. This could be a serious safety issue if you need to quickly exit or enter your vehicle in an emergency. The problem likely involves the door lock actuators or the electrical module controlling them, and may require diagnosis and replacement of the faulty components.

Your car's radio volume suddenly spikes to maximum level on its own, and you can't control it using the volume knob or turn the radio off—this has happened multiple times. The Nissan dealer diagnosed a failure in the audio/video control unit and says it needs to be replaced for about $2,000. When the volume blasts unexpectedly, you're distracted trying to shut it off while driving, creating a safety concern. The fix will involve replacing the faulty A/V control unit.

Your transmission jerks or shudders while you're driving, and this problem has been present since you bought the car in 2021. You've reported it to Nissan multiple times, and while consumer advisors have said the car is undrivable in this condition, the issue remains unfixed. The dealership will likely need to inspect the transmission fluid, filter, and internal components, or possibly replace the transmission entirely.

You've noticed unusual noises coming from your engine while driving at different speeds. When you had your oil tested, metal fragments were found in it, which suggests internal engine wear or damage. This could indicate a serious problem developing inside your engine that may need professional inspection and repair, possibly involving engine disassembly or replacement of damaged internal components.

Your car's brakes are applying suddenly and forcefully on their own while you're driving, including on highways, without any warning or input from you. This unexpected braking creates a serious risk of being rear-ended or losing control of the vehicle. Nissan dealerships have been unable to resolve the issue under warranty, and the problem has persisted for years, making the vehicle unsafe to operate.

While driving at 45 mph, your brakes suddenly activated on their own, causing the rear of your vehicle to fishtail. A warning light appeared briefly showing an image of the rear of the vehicle. Additionally, your driver's side front seat frame is fractured and the seat is loose. Multiple dealers were unable to reproduce the brake issue, and the seat frame repair was not covered under warranty.

While driving 45 MPH, you depressed the brake pedal but the vehicle failed to slow down or stop—the brakes felt completely inoperable. No warning lights appeared on the dashboard. You returned the rental car to the agency, but it's unclear whether the problem was diagnosed or repaired. The issue occurred at approximately 44,794 miles.

Your 2021 Nissan Altima entered limp mode (reduced power) when you pressed the accelerator at a traffic light, and the check engine light came on. A mechanic found debris in your engine oil pan, which matches a known manufacturer issue. The problem occurred around 118,000 miles, and the manufacturer has been notified to investigate.

While driving your 2021 Nissan Altima, you heard an abnormally loud clicking sound from the front of the vehicle. A mechanic diagnosed the problem as fractured front axles on both the driver's and passenger's sides. The axles were replaced to fix the issue.

Your forward collision avoidance system is malfunctioning. The owner's manual recommends checking the system, but you should have a dealer diagnose what's causing the problem. The fix may involve recalibrating sensors, updating software, or replacing faulty electrical components in the collision avoidance system.

Your windshield is cracked and needs repair, but both the insurance repair shop and Nissan dealership say they cannot remove it without damaging your windshield wiper motor. A cracked windshield weakens your vehicle's structure and reduces protection in a crash, creating a safety concern. The repair may require removing the wiper motor assembly to access the windshield bolts.

Your back seat passenger seatbelt won't click into the latch properly, so it may not hold securely in a crash. Your driver seat squeaks and shifts around while you're sitting in it, and your driver side door lock engages while you're trying to open it from inside. These issues should be inspected and repaired to ensure proper safety restraint function and door operation.

Your car's rear door locks aren't responding to the key fob or interior buttons—you have to lock and unlock them manually every time. Additionally, your automatic emergency braking system warning light flashes randomly on the dashboard even when there's nothing in front of you or when road conditions are clear. Your dealership has identified that the body control module (BCM) needs to be replaced and reprogrammed to fix the door lock issue, and the forward collision avoidance system needs diagnostic service to address the false warning light.

Your backup camera display appears distorted or unclear when you engage reverse. This makes it harder to see what's behind your vehicle when backing up. The repair will likely involve diagnosing whether the camera lens needs cleaning, the camera itself needs replacement, or the display unit has a malfunction.

Your rear crash warning light comes on when you're stopped at a traffic light or put the car in reverse even when nothing is behind you. You also get a wiper fluid warning that stays on even after you refill the reservoir. Additionally, you hear a clicking noise when driving at speeds over 50 mph. The dealership has been notified multiple times about these issues. Fixing this will likely require diagnostic testing of the rear sensor system, wiper fluid level sensor, and investigating the source of the clicking noise.