Question to Imaam Muhammad Ibn Saaleh Al-Uthaymeen (rahimahullaah):
A person died in a car accident due to excessive speeding; is it said that this is tantamount to suicide?
No, this is not suicide; rather he killed himself by mistake. If speeding was the cause of the accident, then indeed he killed himself by mistake. That is because if he were asked (i.e. whilst he is alive): ‘’Were you speeding in order to be killed?’’ He will say ‘’No’’. So this (i.e. the death of this individual) is not considered to be suicide, rather it should be said that he killed himself by mistake.
[Source: Liqaa Al-Baab Al-Maftooh 19/73…slightly paraphrased]