Universal Epic Universe ride reliability

1. 1Mine-Cart Madness™6d 11h lost · 113 breakdowns · down on 57 of 60 days 77%
2. 2Hiccup's Wing Gliders6d 6h lost · 103 breakdowns · down on 59 of 60 days 77.7%
3. 3Fyre Drill5d 20h lost · 82 breakdowns · down on 58 of 60 days 79.5%
4. 4Stardust Racers5d 1h lost · 114 breakdowns · down on 58 of 60 days 82.1%
5. 5Curse of the Werewolf3d 20h lost · 76 breakdowns · down on 52 of 60 days 86.4%
6. 6Yoshi's Adventure™3d 8h lost · 65 breakdowns · down on 48 of 60 days 88.1%
7. 7Dragon Racer's Rally3d 4h lost · 57 breakdowns · down on 43 of 60 days 88.7%
8. 8Monsters Unchained: The Frankenstein Experiment3d 4h lost · 17 breakdowns · down on 47 of 60 days 89.1%
9. 9Harry Potter and the Battle at the Ministry™2d 0h lost · 61 breakdowns · down on 49 of 60 days 92.5%
10. 10Mario Kart™: Bowser's Challenge1d 0h lost · 63 breakdowns · down on 50 of 60 days 96.3%
11. 11Meet Toothless and Friends23h 57m lost · 14 breakdowns · down on 17 of 60 days 96.5%
12. 12Constellation Carousel19h 55m lost · 28 breakdowns · down on 37 of 60 days 97.1%
13. 13Bowser Jr. Challenge54m lost · 2 breakdowns · down on 4 of 60 days 99.9%

Breakdowns cluster at 3pm, with 125 of the 761 recorded closures starting in that hour - so the ride you most want is safest earlier in the day, not saved for last. A further 106 rides simply were not running at opening, which is a late start rather than a fault and is counted separately. A further 34 closures start in the 8pm hour, when the park is shutting - those are rides finishing their day, not failing, so they are left out here.

The worst day in this window was 6 Aug, when 34.7% of the park's ride hours were lost and 11 of 13 rides went down at some point.