特斯拉向搭载HW3硬件的车主推送FSD V14 Lite更新后，引发大规模过热故障。[1]至少四名车主向媒体反映，车辆自动驾驶电脑主板温度达到96℃，触发APP_w141_ECU_Thermal故障码，导致FSD功能无法使用，部分车主甚至需要更换整套Autopilot计算机硬件。[1]
特斯拉自6月底开始推送FSD V14 Lite，7月21日大面积开放后，故障案例在两周内不断增加。[1]问题根源在于V14 Lite模型对HW3有限的计算资源压力过大，加重了本已吃紧的散热系统负担。[1]相比之下，HW3的有效内存带宽仅为HW4的15%。[1]HW3平台此前16个月一直停留在FSD V12.6版本，此次大幅跨越版本的更新显然超出了硬件承载能力。[1]除过热问题外，还有车主反映出现倒车障碍检测缺陷等功能问题。[1]据悉，马斯克曾提及下半年HW4.5芯片量产后将向HW3车主提供收费升级方案。[1]
Tesla's rollout of its Full Self-Driving V14 Lite update to vehicles equipped with the older HW3 hardware has triggered widespread overheating problems, with multiple owners reporting their autonomous driving computers reaching temperatures of 96 degrees Celsius [1]. At least four vehicle owners have contacted media outlets about the same malfunction [1], which generates APP_w141_ECU_Thermal fault codes [1]. Some owners have been forced to replace their entire Autopilot computing hardware as a result [1].
The update, which Tesla began deploying at the end of June with broader availability starting July 21, has seen an escalating number of failure cases within two weeks [1]. The root cause appears to be computational strain: the V14 Lite model places excessive pressure on HW3's limited processing resources, exacerbating an already inadequate thermal management system [1]. The hardware limitation is significant—HW3 possesses only 15 percent of the effective memory bandwidth available on HW4, with bandwidth eight times narrower [1]. The HW3 platform had remained at FSD V12.6 for the preceding 16 months before this update [1]. Beyond thermal issues, owners have also reported functional defects, including failures in reverse obstacle detection [1]. Elon Musk previously indicated that a paid upgrade option to HW4.5 chips would be offered to HW3 vehicle owners once the new chips enter mass production in the second half of the year [1].
