2018 Nissan Sentra — Known Issues & Recalls

While driving in heavy traffic, your car had trouble shifting into gear, then suddenly shifted hard with a loud noise underneath. After that, your car stopped moving completely and had to be towed. This appears to be a transmission issue that other owners have also experienced.

Your transmission is experiencing judder (shaking or vibration) in both the CVT (continuously variable transmission) and auxiliary gearbox. This roughness during acceleration or shifting indicates the transmission system needs to be replaced to restore smooth operation.

Your car's continuously variable transmission (CVT) is not working properly. This is the automatic transmission system that controls power from the engine to the wheels. You may experience rough shifting, hesitation, or unusual noises when accelerating or changing gears. A transmission specialist will need to diagnose and likely repair or replace the faulty transmission components.

Your 2018 Sentra's CVT transmission has experienced significant problems requiring a full replacement in 2023, and now similar issues are recurring just two years later. You're concerned that Nissan has a known pattern of CVT transmission failures in other model years with recalls, but your 2018 Sentra has not been recalled despite similar problems affecting multiple owners. Diagnosing and potentially replacing or rebuilding the CVT transmission again will likely be necessary.

Your car won't start when you press the push-button ignition switch while applying the brake pedal. The dealership identified that your stop lamp switch is faulty — this is a known issue affecting 2016-2019 Sentras where silicon contamination builds up on the switch, preventing it from working properly. You may also notice your ABS or Vehicle Dynamic Control warning lights turning on, and your rear brake lights might not illuminate, which is a safety concern. Nissan issued a recall (PM971) to replace the defective stop lamp switch.

Your dashboard has multiple warning lights on—including the ABS, skid control, brake, and warning lights—and they stay on continuously, making you afraid to drive the car. You've had the wheel speed sensors replaced twice based on diagnostic checks from two different shops, but the lights remain on. The issue needs proper diagnosis to identify what's actually causing all these warning lights to stay illuminated, which may involve testing the ABS system, brake switch, or electrical connections.

Your gas pedal sinks to the floor and your car won't accelerate or move. This suggests a problem with your accelerator system, throttle cable, or fuel delivery that's preventing your engine from responding to pedal input.

During a severe accident, your 2018 Nissan Sentra's airbags failed to deploy despite the high-impact collision. The driver's seat collapsed completely, causing loss of control, and the seatbelt system applied excessive pressure that restricted movement. The driver suffered serious injuries as a result. Nissan refused to inspect the vehicle. A full inspection of the airbag system, seat structure, and seatbelt mechanisms will be needed to identify why these safety systems failed.

Your 2018 Sentra was involved in a crash on a rainy highway after hitting a barrier, but the driver-side airbag failed to deploy, allowing the driver's head to strike the steering wheel and neck to hit the seat. Additionally, the driver's seat shifted to a horizontal position, preventing the driver from controlling the vehicle. The driver sustained severe injuries to the head, neck, and back, requiring extended recovery time. A proper diagnostic inspection and potential replacement of the airbag system, seat mechanisms, and related safety sensors may be needed to understand why these critical safety features did not function during the collision.

Your CVT transmission suddenly failed while driving, causing the vehicle to lose power and stop moving forward without any warning lights. A loud noise accompanied the failure, and you had to be pushed off the road by an officer. The Nissan dealership confirmed the transmission needs to be replaced, but Nissan declined to cover the repair cost. The fix will require a complete CVT transmission replacement.

Your car's vent control valve is failing again, just 3 months after a repair shop replaced it in October 2024. The valve controls emissions from your engine, and when it malfunctions, your check engine light comes on. You'll want to have a mechanic inspect whether this is a recurring defect or if the original replacement part was faulty.

Your steering wheel became hard to turn in both directions while driving, and your car beeped with a 'Malfunction' message displayed on the dashboard. After you restarted the vehicle, the problem went away on its own. The issue hasn't been diagnosed yet, so it's unclear what caused it or whether it will happen again.

Your horn doesn't work when you press the steering wheel, even though the horn and fuse are both functioning properly. A mechanic has diagnosed the issue as a faulty clock spring, which is the component that allows electrical signals to reach the horn when you press the steering wheel.

Your brake lights suddenly stopped working, which also prevented your car from starting. A replacement brake light switch fixed the problem temporarily, but it failed again the same day, creating a serious safety hazard since other drivers couldn't see when you were braking. Even though there was a recall for this exact issue on your model year, your vehicle's VIN wasn't included in it, and the problem has recurred multiple times despite previous repairs at a Nissan dealership.

Your car stalls and loses power when you accelerate from a stop—whether pulling out of your driveway, leaving a traffic light, or exiting the highway—making it difficult to reach safe speeds and creating a dangerous situation where you can't judge distances or react to other vehicles. Dashboard warning lights frequently illuminate together, then disappear days later with no clear cause. Additionally, your collision warning system sometimes alerts you to cars that aren't there, and other times fails to warn you about vehicles you nearly hit. The combination of these issues makes the car unpredictable and unsafe to drive. Diagnosis would likely involve a full computer scan to identify fault codes, inspection of the fuel injection and engine control systems, and testing of the collision avoidance sensors.

Your transmission has been replaced once already, and the dealership has had to reinstall a component that came loose. Now your car won't shift into gear when you try to turn, and it rolls even when parked in park. This suggests a serious transmission malfunction that requires immediate inspection and likely another transmission repair or replacement.

Your car's ICC (Intelligent Cruise Control) module may fail, causing your brakes to engage unexpectedly on their own. This is a known issue affecting Sentras, and Nissan is charging over $2,000 to replace the faulty module. The repair involves replacing the ICC module that controls your forward collision avoidance and cruise control systems.

Your car's powertrain diagnostic system won't communicate with standard scan tools, making it impossible to read error codes—even dealership mechanics can't diagnose the issue. You're experiencing transmission problems where the car feels like it's skipping gears or losing power while driving, and it has stalled on its own. Additionally, the passenger-side wheel has partially collapsed because the lower control arm separated from its joint, causing the tire to tilt at an angle and creating a serious safety hazard. This will likely require transmission diagnostics and replacement, along with lower control arm and suspension repairs.

Your gas gauge is displaying incorrect readings—it showed you had 108 miles of fuel remaining when you actually ran out of gas with no warning lights. This has happened multiple times, leaving you stranded in traffic, and your car won't start until fuel is added. The fuel gauge sender or fuel level sensor may need replacement to provide accurate readings.

Your brake lights may stop working due to a faulty brake light switch. This happened to your 2018 Nissan Sentra at 66,000 miles. Your mechanic diagnosed and replaced the brake light switch to fix the problem.