Tesla has officially launched a recall for 239,382 vehicles equipped with its new generation of computer system, nicknamed AI4 or HW4. These computers were supposed to improve performance and prepare cars for fully autonomous driving. But now they encounter a serious problem: a short circuit can occur, disabling crucial functions such as rear cameras, automatic windshield wipers or even GPS navigation.
Not-so-smart on-board computers
Affected models include the Model 3, Model Y, Model S, and Model of kilometers. Tesla received nearly 900 complaints related to this issue before the end of 2024.
This reminder does not fall from the sky. As early as December, reports had already pointed to a worrying failure rate on these computers, particularly in cold conditions. According to Tesla, the combination of certain software and hardware components could cause abnormal current feedback, which triggers a short circuit. A major concern, especially for a brand that relies heavily on its cutting-edge technologies.
To correct this problem, Tesla opted for its usual method: software updates deployed remotely. Since mid-December, a patch has been deployed to adjust the car startup sequence and limit the risk of short circuits. Vehicles manufactured after December 16, 2024 already include this correction.
However, this fix is not always enough. If a vehicle's computer has ever failed or has problems that could cause a short circuit, Tesla will need to replace the faulty component. And that's where it gets stuck: some customers have to wait several months before receiving their new computer. In the meantime, they drive cars without essential features.
American authorities, notably the NHTSA (National Highway Traffic Safety Administration), are closely monitoring the situation. The non-compliance of the vehicles with safety standards forced the manufacturer to act. If the recall mainly highlights the problem of rear cameras, which make vehicles non-compliant, the bug is in reality much broader. It affects the entire computer and undermines key functions.
This massive recall raises questions about the reliability of Tesla's innovations, particularly as the brand touts its advances in autonomous driving. The HW4 computer was to be a pillar for Elon Musk's robotaxis ambitions. But with such problematic bugs, this futuristic vision still seems far from being achieved.
For now, Tesla assures that software updates and computer replacements will be done at no cost to owners. But some will have to wait a while before receiving them.
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