The BMW iX3 should be practical enough for family use if its cabin layout suits your passengers. Useful size figures include 2025 50 xDrive: 4782 mm; 2025 50 xDrive: 1895 mm; 2025 50 xDrive: 1635 mm; 2025 50 xDrive: 2897 mm; 2025 50 xDrive: 5. Wheelbase and seating matter most day to day because they influence rear-seat comfort, child-seat friendliness and how relaxed the car feels on longer trips.