2023 LEXUS RX Engine Problems

When removing foot from gas pedal the rpm shoot up to almost 4k instead of switching to EV mode or dropping to 1k rpm’s. This has scared my wife causing her to slam on brakes as she thought throttle was stuck since the rpm’s shot up. This is dangerous. It doesn’t happen all the time and Lexus did duplicate it but said was normal.

- 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...

I pulled onto a 4 lane divided highway and the car immediately went into limp mode, meaning the car would not go more than 1 MPH even with the gas pedal to the floor. I could NOT accelerate thus my safety was in danger, and I was almost hit by a tractor trailer truck. I pulled over to the side of road as best I could, then shut the engine off and restarted the engine. This apparently re-set some sort of engine control and then the car accelerated normally. The dealer applied an ECU update #24LC03. When I researched this update, it was stated that this was not an actual recall, I wondered how that could that be since I was nearly involved in a fatal accident, and surely there are other similar Lexus owners at the same risk . that I was. The wording of the update described exactly...

When driving, the car engine will randomly accelerate or race. The car does not physically go faster, but the engine revs at a high speed which is very scary. It will continue to accelerate while your foot is off the gas until you either press back down the gas pedal or come to a full stop. The car engine revs extremely loud making the driver feel like the car is going to keep going. I have had the car for 15 months and it continues to get WORSE. I have taken the car 3 times to the Lexus in Freehold NJ when I first bought it to fix this issue. They were able to replicate it in my car but said the tests came back normal and told me this was a "normal reaction" due to the car being a hybrid. The diagnosis was that it was the battery discharging....

The vehicle hesitates off a full stop such as at a red light. The automatic start stop feature is turned off manually, but car hesitates off the stop creating an unsafe condition if making a left turn where there is no left traffic arrow turn signal and cars are coming in the opposite direction or when entering a moving lane. The hesitation is enough to prevent you from entering or crossing moving traffic unless you wait for all traffic to be gone. This only happens when it is hot outside. When it is cool and air temperature is lower this does not occur and the car operates as normal. Has happened since new and Dealer cannot look into it because there are no failure codes appearing on the car's system.

We have encountered 2 instances of Unintended Acceleration. Lexus has inspected the vehicle and states they could not find anything wrong. In both instances the car jumped forward without notice. No warnings were given. The first time it occurred there was over $8,500 worth of damage. No damage the second time which occurred on May 20, 2024.

The contact owns a 2023 Lexus RX350. The contact stated that on three occasions while driving at various speeds, the vehicle lost motive power for approximately 20 seconds, and then accelerated as needed. There were no warning lights illuminated. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 4,200.