What is the ruling of Islamic law regarding a car accident that led to a person's death, where the questioner was 25% at fault, and is he required to fast for two consecutive months?

It is not possible to issue a fatwa on a specific matter without being fully aware of its circumstances, and the matter should be referred to the Sharia court. In general, if the driver made every effort to avoid the collision, was not the cause of the accident, and did not neglect checking the car and adhering to traffic rules, then there is no expiation (kaffarah) or blood money (diyah) upon him. The Islamic Fiqh Council has clarified that vehicle accidents are subject to the rulings of criminal offenses in Sharia, and the driver is responsible for the damages he causes, except in cases of force majeure, the action of the injured party, or the fault of another. If the driver and the injured party both contributed to causing the damage, each bears the consequences for what was damaged by the other. If joint responsibility for the accident is proven, expiation (kaffarah) is incumbent upon each contributor in unintentional killing, while blood money (diyah) is the responsibility of his 'aqilah (male kin).