2023 Lexus RX Powertrain & Transmission Problems

[XXX] ’s my wife we’re driving in Sacramento.The vehicle was stopped at a traffic signal waiting for the light to change. Suddenly, without warning the vehicle started violently shuddering/shaking, scaring us completely. The shaking stopped when my wife put into park. But for those few seconds it was extremely scary. This incident should be investigated by the NHTSA as a repeat of the incident in moving traffic may cause severe property damage, serious injury and possible loss of life. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I am experiencing ongoing issues with my 2023 Lexus RX500h related to the powertrain/transmission. The vehicle has exhibited abnormal shifting behavior, including hesitation, jerking, and inconsistent acceleration. At times, the vehicle does not respond smoothly when accelerating, which raises safety concerns, especially when merging into traffic or driving at highway speeds. The issue occurs intermittently and has persisted despite multiple attempts to diagnose or address the problem. The condition affects the drivability and reliability of the vehicle and has not been resolved.

Numerous issues relating to drivetrain of 2023 Lexus RX500h: 1. Extreme vibration/shudder under reverse - example documented forum link: [XXX] 2. Uncontrollable jerking motion whilst stopped, as if vehicle was slipping in and out of gear trying to move forward - brakes were disengaged the entire incident There are no warning lamps or messages that occur during these incidents, however these issues cannot in any way be construed as normal operation. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact called on behalf of his mother who owns a 2023 Lexus RX500H. The contact stated while his mother was reversing, the vehicle shuddered abnormally. The contact stated that while his mother was depressing the accelerator pedal, the vehicle failed to accelerate as intended. The driver turned off the vehicle and the vehicle restarted after several attempts. The vehicle was driven to the shoulder of the roadway. The contact stated that the failure had occurred twice. The contact stated that the transmission was previously replaced in January 2025. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was made aware of the failure. The failure mileage was approximately 7,500.

- Uknown: 2023 RX 500H Performance hesitates or stalls when gas is applied to accelerate. When vehicle final start moving after 2-4 seconds, engine revs really high. This is believed to be an issue in the power train and specifically Transaxle issues and ECU programming issues. More on this issue can be found on Lexus service bulletin Record ID #4807268. Yes, vehicle is available for inspection. - Yes, with the vehicle stalling out in cross traffic, it has almost caused me, my wife and child to get t-boned on multiple instances. Lexus corporate and the Lexus dealer had been made aware of this concern on multiple occasions. - No, Dealer has not been able to reproduce after multiple reviews. I do have video proof of the car doing this taken after final attempt for Lexus to review. This video has been sent to Lexus corporate and Lexus Dealer. - Vehicle has been inspected by Lexus dealership as a representative of Lexus corporate. My Dealer has looked at it multiple times and can never duplicate and will not help. I worked with Lexus directly and also were not able to help. Lexus corporate has now turned my case over to their Lemon Law department for review on 7/8/24 due to this issue and many more issues with car. I provided requested information to Lexus Corporate Lemon department on 8/12/24 and have not hear back as of 10/24/24. - Unknown: Issue occurs few time a week since purchased the car on 2/4/2023, but do not recall first experience. Issue occurs more after the car has been sitting for a while on a hot day or not drove in a few days, and will stall out mostly on a left hand turn. The issue feels like the battery is dead and the gas engine has to take over for it causing a lag. When the engine does finally take over it seems to rev really high too. After it does it once or in some cases twice at the beginning of the drive it is typically okay the rest of the drive.