While driving from Costco in Fountain Valley to Best Buy in Costa Mesa, I was using FSD for the entire route. Everything was running smoothly until we approached South Coast Drive near the I-405 interchange (Costa Mesa, CA). At that point, the FSD system incorrectly directed the vehicle to enter a freeway off-ramp, effectively driving into an I-405 freeway exit ramp in the wrong direction. This created a highly dangerous situation, as the ramp was intended for vehicles exiting the freeway, not entering. Fortunately, I was able to take over control of the vehicle and prevent a potential accident, but this was a very close call. Incident Details â¢Date: March 21, 2025 â¢Time: Between 2:00 â’ 3:00 PM â¢Location: South Coast Dr near I-405 on/off-ramps (Costa Mesa, CA) â¢Route: Costco Fountain Valley → Best Buy Costa Mesa â¢Navigation Mode: Full Self-Driving (Beta) enabled throughout â¢Conditions: Daylight, dry roads, moderate traffic What Happened â¢FSD turned the car onto a road segment that functions as a freeway exit. â¢The vehicle entered the lane facing oncoming traffic exiting from I-405. â¢I immediately disengaged FSD and took manual control to correct the situation.