(Washington) Tesla to recall nearly 135,000 cars in the United States, Model S and Model X, for a safety problem related to the on-board computer, after an alert launched in mid-January by the American agency of road safety, NHTSA. The recall involves 134,951 cars, according to a letter from NHTSA forwarded to Tesla and released on Tuesday. This concerns Model S sedans manufactured between 2012 and 2018, as well as Model X city SUVs produced from 2016 to 2018, whose on-board computer is equipped with an Nvidia Tegra 3 processor. of the most important safety recalls encountered by Tesla. However, the number of recalled vehicles is lower than the 158,000 that the regulator requested from Tesla in mid-January. The NHTSA letter does not explain this difference. Tesla was not obliged to comply with the request of the federal agency but had an obligation in this case to provide an explanation to NHTSA, which then decides. For comparison, 158,000 cars represent nearly a third of all cars delivered by the manufacturer in 2020. Tesla will have to replace a part of the on-board computer of the vehicles actually recalled. This defect “can lead to the loss of the display of the reversing camera, of the defrosting / demisting control parameters and of the flashing light, reducing visibility and increasing the risk of accident”, details the NHTSA in its letter. The memory of the on-board computers, especially the infotainment system (MCU), has a limited life cycle, which means that this system may not function properly after a certain number of programs. This problem can also cause deletions of memory cycles. “During an MCU failure, the screen goes black and the rear view camera, also a backup camera, is no longer available to the driver. If the image is no longer available, the risk of an accident increases, which can potentially lead to injuries or even death, ”the regulator explained in its report published in January. This problem can also affect Autopilot, the driving assistance fitted to Tesla cars, he warned.