Tesla FSD V14.3.1 impressions

Tesla’s latest Full Self-Driving build, version 14.3.1, is drawing early praise for smoother behavior on the road as the company adds a new Grok voice assistant inside the car. (tesla.com 1) (tesla.com 2) Full Self-Driving is Tesla’s driver-assistance system, not a robotaxi mode: Tesla says it can handle lane changes, turns and route-following, but the human driver must stay attentive and ready to intervene at all times. Tesla sells the feature for $99 a month in the United States. (tesla.com 1) (tesla.com 2) Tesla says the system is trained on billions of miles of anonymous real-world driving data, and its investor materials in January 2026 said cumulative miles driven with Full Self-Driving had reached the billions. The company has not posted a public release note page for version 14.3.1, so the specific changes in that build are being inferred from early drives and Tesla’s own demos rather than a formal changelog. (tesla.com 1) (tesla.com 2) (tesla.com 3) The other part of the update is Grok, an in-car artificial intelligence assistant from xAI that Tesla now offers in beta on eligible vehicles. Tesla says drivers can press and hold the steering-wheel microphone button or open the Grok app, then ask questions, issue navigation commands and set reminders hands-free. (tesla.com) Grok is not available on every Tesla. Tesla says it currently requires a Model S, Model 3, Model X, Model Y or Cybertruck with an AMD processor, vehicle software version 2025.26 or later, and either Premium Connectivity or Wi‑Fi. (tesla.com) (tesla.com) Tesla is rolling out both features while regulators are still scrutinizing its driver-assistance systems. In October 2025, the National Highway Traffic Safety Administration opened a preliminary evaluation into reports that Tesla vehicles using Full Self-Driving may have made maneuvers that violated traffic-safety rules, including at red lights, in wrong-direction entries and at railroad crossings. (nhtsa.gov) Federal investigators are also still examining other Tesla automation issues. The National Highway Traffic Safety Administration opened a separate investigation in October 2024 into four crashes in reduced-visibility conditions involving Full Self-Driving, including one fatal crash with a pedestrian, and escalated another Tesla probe in March 2026. (nhtsa.gov) (nhtsa.gov) Tesla’s broader business gives the software push extra weight. The company said on April 2, 2026 that it delivered more than 358,000 vehicles in the first quarter and produced more than 408,000, putting more cars on the road that can receive over-the-air updates. (tesla.com) For Tesla owners, the near-term test is simple: whether version 14.3.1 keeps reducing abrupt braking and awkward reactions in everyday driving while Grok proves useful enough to become a regular part of the dashboard. (tesla.com) (tesla.com)