Is it permissible to postpone Hajj in order to buy a car?

There is no harm in buying a car if you need it, even if it leads to delaying Hajj, because financial capability is a condition for Hajj to be obligatory. This includes possessing wealth surplus to essential needs, such as a car that suits your situation without extravagance. However, if you do not need the car, then Hajj must be prioritized over buying it.