During the race I was wondering how the race would have evolved if Toyota did not have to fix the illuminated car number. I just had a look at the timing data on
http://fiawec.alkamelsystems.com/ to try to answer this question.
Toyota's third pitstop toke 8 min 38 sec and not 1 min 20 sec, like the first two stops. That means that Toyota lost
7 min 18 sec with the repair of the number panels.
The Toyota crashed 4 hours 40 min into the race, after it had completed 144 laps. At that moment the Toyota was 3 laps and 46 sec behind the #1 Audi. If we assume that one takes 1 min 49 sec, the gap between #1 and #7 would have 6 min 13 sec. So hypothetical the Toyota would have been
1 min 5 sec into the lead at that stage of the race.
We know that Toyota would have had to do a 7th fuel stop to finish the race, whereas the #1 Audi only had to do 6 stops. That additional stop would have cost Toyota around
1 min 20 sec.
Conclusion: Toyota would have needed to gain an additional 15 sec on the track, in order to keep the lead after its last stop. That suggests that it could have been a very close finish.