The current BMW iX3 is 4,782 mm long, 1,895 mm wide and 1,635 mm tall, on a 2,897 mm wheelbase. It has grown 5 cm longer since the 2020 iX3.
| Years | Length | Width | Height | Wheelbase | Boot capacity | Turning circle |
|---|---|---|---|---|---|---|
| 2020–2025 | 4,734 | 1,891 | 1,668 | 2,864 | 510 | 12.1 |
| 2025–presentCurrent | 4,782 | 1,895 | 1,635 | 2,897 | 520 | 12.1 |
Exterior figures are manufacturer specifications for the iX3, averaged per generation across its variants and shown for the most common body style. Generations with the same size are merged. Boot capacity is the seats-up figure where the manufacturer quotes one.