2024 LEXUS NX Electrical System Problems

Driver dash does not illuminate upon starting vehicle. No MPH or other drives gauges display.

Vehicle: 2024 Lexus NX 450h+ (plug-in hybrid) Odometer at latest event: ~14,600 miles Dealer: Motor City Lexus of Bakersfield (Bakersfield, CA) Lexus Corporate Case #: 250823001008 Complaint Description: While driving, the vehicle suddenly lost all electrical power without warning on two separate occasions, causing the instrument cluster to go dark and an immediate loss of power steering and brake assist. I had to coast to a stop—this is a serious crash risk. Timeline of events: • 08/20/2025 – In-motion total electrical blackout with loss of steering/brake assist at approximately [speed] mph. • 08/21/2025 – Dealer replaced the 12-volt battery. • 08/23/2025 – Repeat in-motion blackout with my children in the vehicle; dash went dark, loss of steering/brake assist, coasted to a stop. • After 08/23/2025 (at dealer) – During diagnostic testing, a dealer technician reproduced the same failure (total electrical power loss while moving, dash dark, loss of steering/brake assist). This confirms a repeatable safety defect. • There have also been three additional immobilizations that required Lexus Roadside Assistance on other dates. Current status: Vehicle remains at the dealer for the second repair attempt. I am within the 18-month window from delivery (Mar/Apr 2024). Safety concern / suspected area: Sudden total electrical loss while driving with loss of steering/brake assist. Please investigate potential defects in the 12-V/DC-DC charging system, hybrid/electrical system (inverter/DC-DC/grounding), main fusible link, or related wiring/connectors/grounds that could cause complete power loss while the vehicle is in motion.

The contact owns a 2024 Lexus NX 350. The contact stated that while driving at an undisclosed speed, the blind spot warning light inadvertently illuminated without another vehicle nearby. The vehicle was taken to the dealer but was not diagnosed or repaired. The manufacturer was made aware of the failure and a case was opened. The failure mileage was approximately 19,000.

Mileage: 19,000

My 2024 Lexus NX 450h+ experienced a complete 12V battery failure after normal short-distance driving, leaving me stranded without warning. This is a known defect in Lexus plug-in hybrids that the manufacturer has not properly disclosed to buyers. Incident Details: After several short trips (all under normal driving conditions), my 2024 Lexus NX 450h+ failed to start. The vehicle was completely non-responsive. Because the doors and liftgate were locked and inoperable, I was forced to crawl through the rear cargo area with a pre-existing mobility issue (bad leg), causing significant physical pain and emotional distress. I later had to visit the Emergency Room due to pain and strain from the incident and was prescribed medication. When I reported the problem to Lexus Corporate, they initially attempted to shift blame onto my roadside assistance provider (AAA) instead of acknowledging the mechanical defect. No solution was offered to ensure the vehicle’s reliability for daily use. Ongoing Concerns: •Lexus has not issued a recall or fix for the widespread 12V battery failures affecting plug-in hybrid vehicles. •This issue poses a significant safety risk, particularly to older drivers, disabled individuals, and anyone who relies on their vehicle for essential transportation. •I purchased this vehicle at a premium price, expecting reliability, and it has failed in fundamental ways. •Being stranded without warning and physically harmed while trying to exit my own vehicle is completely unacceptable for any car, let alone a brand-new luxury model. Given the known nature of this defect (widely reported by other owners online), Lexus must be held accountable for addressing the safety hazards caused by faulty 12V battery systems in its 2024 NX 450h+ plug-in hybrid.

There’s something wrong in the electrical system. In order to start the car, it requires boosting the battery only. Boosting under the hood doesn’t work with the lithium power packs charged 100%. After signing the financial documents the day I test drove it, I couldn’t drive it home if I wanted to. The car wouldn’t start. I don’t know how the dealer got it started but I have been intermittently boosting it to start. This happens whether the car sits a day or more. The last frequent boost was 3/17/2025. Another thing, the car can be in driver assistance with lane tracking and the lane tracking will shut off automatically. Also, when the lens of the cameras on the car gets wet, the cameras don’t work. They become foggy blank.

Lexus [XXX] & [XXX] [XXX] [XXX] [XXX] Lexus P.O. Box 259001 Mail Drop E3-2D Plano, TX 75025-9001 To Whom It May Concern, I am writing to express my serious concerns regarding a safety issue we encountered with our 2024 Lexus NX350, purchased from your dealership at 1000 Interstate Parkway, Akron, Ohio, 44312, in August 2023. Our purchasing experience met the high expectations associated with the Lexus brand, and we were pleased with the vehicle's features. During the delivery process, we received a walkthrough of the car's functionalities, and the technician assisted us in connecting her phone to download the app. However, there were no tutorials or instructions provided regarding the safety features, particularly in the event of an emergency except for showing us the SOS button on the at the roof panel On [XXX], my wife, [XXX], was involved in an accident while driving the NX350. I have included a photo to illustrate the extent of the damage. When the police arrived, [XXX] found herself unable to open either the driver or passenger doors; all doors were unresponsive. The officer (Hetrick #426) from the Macedonia, Ohio Police Department was also unable to assist her from the outside because the doors were not functioning from his side, as he could not determine if she was injured. She used the SOS button, which the call center was responsive, however, the could not assist with helping her to make the doors function. Faced with the urgency of the situation, [XXX] had no choice but to climb out through the window, which was extremely difficult for her given her injuries. This incident raises significant safety concerns. When we contacted the dealership to inquire about any known defects, we were told there were none, and the response was defensive, focusing on how we were instructed to manually open the doors during our walkthrough. However, neither of us was shown how INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

On Sep 16, 2024 I purchased a 2024 EX450 Plug-in Hybrid. During the purchasing process that new car delivery person recommended using the Lexus app which I installed. From Sep 18 through Sep 23 I drove the car in the EV mode around my community. I put on approximately 15 miles. On the morning of Sep 24, 2024 I needed to go to an important meeting. On Sep 23 in order to prepare for a 40 mile drive I plugged the car in and obtained a full charge. At 6:15am I opened the hatch and packed my car. The rear hatch opened without any issues. At 6:30 am I tried to enter the car and the car was locked. Fortunately I left the hatch open and I was able to crawl through the back of the car and open the car doors. I then tried starting the car and the car would not function, no click, no lights, all electric systems were dead. I reviewed the app on my phone and what was 36 miles 100% charged the previous night now stated 0% charged and -1 miles. Something had discharged the car overnight. There were no lights on or doors left open. The car was transported to the dealer. After a day of testing the battery (which was within spec) and the functions of the car the tech recommended the app that I used to monitor the charge status and other status's of the car including the ability to remote start the car be removed from my iphone. It is thought that the car overly communicates with the app thereby draining the battery. Doing on-line research I learned that others have come to this same conclusion. I am requesting that Toyota Motor Company immediately investigate this issue and if the app is the culprit immediately issue a warning to all its consumers that use the app to immediately remove the Lexus app from their phone. If a person had placed their children in a car seat, activated the hatch and closed the doors the doors would automatically lock. A caregiver could inadvertently lock their child in the car.

Less than 10 months old (March and April 2024 at ~5,000 miles), the 12V battery completely drained 3 times in 5 days (despite driving it regularly during that period) so the car would not start when needed. I had it jumped 3 times by AAA and the third time drove it to dealer. Dealer told me battery was defective so it needed to be replaced under warranty. Problem reported to Lexus Customer Service. The same problem recurred 3 months later (July 2024 at 6000 miles) the morning I was packing it to leave on vacation. The battery died while I was in the car and I was locked inside. When I got out, the doors locked again so had to have the car towed to a different dealer. They told me the battery needed to be replaced AGAIN under warranty. Two Lexus dealers, Lexus Customer Service, and Lexus on-line forum have noted this problem with several Lexus hybrid and PHEV models for a period of 1-2 years. When I asked, Lexus (2 dealers and Customer Service) told me that there is a defect in the software or app communication settings that causes a continuous drain on the 12V battery causing battery to fail unexpectedly. There has been NO NOTIFICATION of this defect and no resolution to this problem has been provided in the past 5 months. It is a risk for the entire electrical system to fail unexpectedly for no apparent reason with NO WARNING. The car is unreliable and cannot be used if it will not start when it is needed. We are elderly and have grandchildren living with us periodically. We are at risk if we cannot get to medical appointments or drive to the hospital.

The Drivers side door (light at the bottom of the door) sparked and then the door went up in flames. At that point the electricity in the car ceased to work. The car is available for inspection at the dealership where we had it towed. If the door was closed and there was someone in the car when it happened then they would have gotten burned or worse. Our insurance company is investigating and Lexus has been taking their time and helpful in the matter. Fire Department checked out the car at the time and said the wires in the door were very hot after putting out the fire. There were no symptoms or warnings prior to this happening.

I was in a car accident on the freeway . I had just got onto the freeway so I couldn’t have been going that fast . The brakes on this Lexus Nx [XXX] to say the least . Also the collision sensor and warning also are useless. The warning light and sound didn’t go off until I was basically rear ending the other vehicle . I had a different , 10 year old car . A 2014 that would start to pump air and brake itself even when the car sensor believed it was close to a car and I wasn’t braking . This 2024 Lexus didn’t brake nor warn me in time . When I did notice the car in front of me had come to a complete stop I immediately hit the brakes but the car was still sliding forward ! This sliding motion happened once before when I made a u- turn and had to stop because of the line going into a shopping center . Luckily that time I had more space and lower speed and more time to react. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The Lexus is equipped with a large screen which displays GPS and other Apps. The car has been programmed with a pop up advertisement which states "Experience Drive Connect" that is an additional paid subscription which I do not want. I can reach over and touch an icon that removes the pop up which only pops up again a short time later. According to Stevinson Lexus and Lexus for help site there is nothing they can do to remove the pop up. Here is the safety issue: My attention to driving has been comprised by having to look at the screen to remove the pop up which only pops up a short time later. This unnecessary advertisement is simply not wanted.

Driver door suddenly opened while driving.