BMW iX3 嘅行李箱標準容量為 510 公升，由於電池組平放喺車底，完全冇佔用到車廂空間。當後排座椅按 40:20:40 比例摺低後，BMW iX3 嘅儲物空間更可擴展至 1,560 公升，無論係放嬰兒車、單車定係大型超市購物袋都綽綽有餘。
The BMW iX3 offers a standard trunk capacity of 510 liters, and since the battery pack is integrated into the floor, it does not compromise interior space. With the 40:20:40 split-folding rear seats, the BMW iX3's cargo volume expands to 1,560 liters, easily accommodating strollers, bicycles, or large grocery hauls.
