FSD v14 Rollout and Performance Improvements

Tesla is rolling out FSD v14.3.3/4 with MLIR2 compiler rewrite, 20% faster reaction time, and unified wave (2026.21.6) fixing brake stabbing. South Korea included. Release notes confirm vision encoder upgrades and intervention tracking. Additionally, FSD v14.1 Lite is rolling out with merged firmware branch, addressing HW3 ECU overheating with documented temperature thresholds (0°C-90°C) and a potential hardware failure case. FSD subscription now live in Europe at €99/month, replacing one-time purchase. Lemonade insurance offers 50% per-mile discount for FSD miles, signaling industry recognition of safety. This marks a significant step toward fleet-wide V14 architecture and commercial adoption.