Transmission problem in premium Lexus LX600 SUVs
Even the most sophisticated and reliable luxury SUVs can have problems. Lexus is warning owners of new LX600 models about an increased risk of an accident, and in rare cases – even a potential fire hazard. The source of the problem is not a secondary component, but the 10-speed automatic transmission installed on the brand’s flagship model.
Key points of the problem:
Recall details and potential risks
The recall notice, published via the National Highway Traffic Safety Administration, states that one of the solenoids responsible for gear shifting may fail. In such an event, the transmission and engine electronic control units may lose proper communication. Due to an issue in the software logic, the system may also fail to prevent engine over-revving in certain gears.
In addition to possible transmission damage, this malfunction can cause a loss of power while driving, increasing the risk of a collision. If the transmission case is damaged, it could lead to fluid leakage, which, in turn, increases the threat of a fire.
Scale of the problem and detection process
According to Lexus, the recall affects 4,374 units of the 2025-2026 model year LX600 equipped with an Aisin-manufactured 10-speed automatic transmission. The affected SUVs were manufactured between November 22, 2024, and December 8, 2025.
Toyota first identified a potential issue related to the transmission electronic control unit’s logic in October, which prompted a detailed investigation. Engineers collected and analyzed remote monitoring data from involved models in Japan before expanding the review to other markets in January. They also studied data from vehicles that experienced linear solenoid failures.
Additional data revealed vehicles with linear solenoid failures and showed that certain subsequent customer usage patterns could potentially lead to over-revving that would not be suppressed due to the software issue.
The automaker stated that it cannot estimate what percentage of vehicles actually have this defect. It was also added that the company is not aware of any field reports or warranty claims related to this issue.
Next steps for owners
Owners of affected LX600 models in the US will be notified of the recall in April and invited to Lexus service centers. Dealers will update the transmission electronic control unit software free of charge, which should resolve the issue.
This recall situation is a reminder of how complex and interconnected modern vehicles have become, where software plays a critical role in safety and reliability. Despite Toyota and Lexus’s reputation as leaders in reliability, the constant advancement of technology requires close attention to detail, especially in key components like the transmission. The company’s swift response and free fix are standard procedure, but this case highlights the importance of transparency and promptness in informing customers about potential risks associated with their vehicles.