A Tesla owner posted dashcam footage of his car driving straight over a log lying across the road while running Full Self-Driving (FSD) v14.1 Lite, without braking or slowing down.
The clip has more than 800,000 views, and it adds to a growing list of problems we’ve documented with Tesla’s “Lite” version of FSD on older Hardware 3 cars.
In the video, posted by X user @donvarri on August 21, the car is on a wet, foggy rural road with the “Self-Driving” visualization active at 32 mph. A log sits across the lane. The Tesla runs right over it. No braking, no swerve.
Mine drove over a log in the road it def wouldn’t have stopped same 14.1 lite pic.twitter.com/pZYUjJewHO
“Mine drove over a log in the road it def wouldn’t have stopped,” the owner wrote. He later confirmed the car is a Hardware 3 vehicle running the latest v14.1 Lite build.
FSD v14 Lite is a compressed version of the HW4 v14 model, squeezed onto HW3’s memory-constrained AI3 computer, which has 8GB of RAM and roughly one-eighth the bandwidth of the newer hardware. Tesla started rolling it out to Hardware 3 cars in June.
Owners have documented HW3 computers overheating under the extra processing load, triggering an APP_w141_ECU_Thermal_Issue fault above 90°C, with some temperatures hitting 96°C. In several cases the system threw “red hands” and forced a disengagement, and a few computers shut down entirely and needed replacement. On top of that, drivers reported phantom braking, hesitation, and brake stuttering.
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