What is the ruling on participating in the purchase of a car in installments with the intention that each partner owns a share proportionate to the amount they paid of the price, and how are the repair costs of the car divided when it breaks down if one partner uses the car more than the other?

This partnership is corrupt due to the unknown share of each partner, the unknown price each will pay, and the unknown division of profit. To rectify it, the first contract must be annulled, and a new contract established, clearly defining the percentage of participation in the car and the amount each partner will pay from the outset.

As for working with the car, the worker operating it shall receive a wage, either a fixed amount or a percentage of the earnings. The remaining proceeds from the car, after expenses and wages, shall be divided among the partners according to the proportion of their ownership. Previously paid installments shall be settled by mutual agreement.

Regarding car malfunctions: 1. Malfunctions resulting from the transgression or negligence of one of the partners shall be their responsibility to repair. 2. Malfunctions resulting from normal use, such as battery and tire wear or oil consumption, shall be borne by each partner according to their share.