ES EN
Tesla Referral →
FSD v14.3.9 ★ Latest version

The mountains, hands off the wheel. Town, into oncoming traffic.

It went up and down to Lares on roads where sometimes only one car fits, and I never had to take the wheel. But twice in the same day it was heading into oncoming traffic. That is a severe failure, and on its own it holds the score at 6.0.

ReleasedSeptember 13, 2026
VehicleHW4
Miles71.9
% on FSD97%
Score recalculatedSeptember 25, 2026

Categories · v14.3.9

Compared to v14.3.8

Decision-making 5.3 ▼
Maneuver flow 9.2 ▲
Hesitation (10 = none) 10 ▲
Speed handling 10 ▲
Complex maneuvers (merges) 10 =
PR roads (speed bumps, potholes) 5.6 ▼
Driver interventions 5 ▼
Obstacles and emergencies 5.7 ▼
Parking 5 ▲
✓

Improvements (3)

  • ✓
    Narrow mountain roads, no hesitation

    On the whole climb to Lares I never had to take the wheel, and coming down through San Sebastián was the same. One lane each way, cars pass close, and it doesn't hesitate. That downhill leg is the only one of the day Wattly shows at 100% FSD.

  • ✓
    Where only one car fits, it waited for the oncoming one

    At a construction zone down to one lane, a car was coming downhill. It stopped, waited for it to pass, and then went through, without me stepping in.

  • ✓
    The turn onto the main avenue, right this time

    This time I left home with FSD on and it turned left correctly. Keep in mind there was no traffic. The problem is when there is traffic, because it doesn't make the decision in time.

⚠

Known issues (5)

  • ⚠
    Into oncoming traffic, twice in the same day

    The first was in downtown Aguadilla, with the one-way sign and its arrow pointing the other way right there. The second, on the way out to the ice cream shop. To be fair, this mistake doesn't usually happen often, but twice in one day is unusual, and it can't happen.

  • ⚠
    Emergency lights in the opposite lane: the overreaction is back

    It pulled over to the right for an ambulance and later for a tow truck, both in the opposite lane. I didn't have to step in, but the previous version had already fixed this and it is back in this one.

  • ⚠
    Potholes, it still doesn't avoid them

    Leaving home and arriving at the ice cream shop I took the wheel for the potholes. In the plaza by the shop it went around several times because it didn't know where to park, and hit the same pothole several times.

  • ⚠
    Parking is still the weak point

    In Lares it parked somewhere that wasn't even a parking spot, and at the restaurant it picked one I didn't like. Both times I moved it myself. At the ice cream shop I ended up taking the wheel and using autopark.

  • ⚠
    Driving against traffic holds the score at 6.0

    It happened twice, and it is a severe failure: on its own it caps the score at 6.0, where it would otherwise be 7.3. I took the wheel at that exact moment, so that intervention is not counted separately. The dip at home, the potholes, parking, and the overreaction to emergency vehicles also failed, but they count against their category without a cap.