2025 BMW X3 (G45) Dimensions, Size & Specs

With mirrors folded, the BMW X3 (G45) is 1920 mm (75.6 inches) wide, but the width extends to 2132 mm (83.9 inches) when mirrors are opened. This difference of 212 mm (8.3 inches) is important for drivers when navigating narrow streets or parking spaces. The extra width due to opened mirrors means you should exercise caution in tight environments, such as narrow garages or urban street parking, to avoid potential damage or collisions with other vehicles or objects.

The curb weight of the 2025 BMW X3 (G45) ranges between 1855 kg (4088 lbs) and 2065 kg (4553 lbs), depending on the specific trim and equipment options. A heavier curb weight contributes to a more planted and stable ride, especially at higher speeds, enhancing safety and comfort. However, higher weight can also slightly reduce fuel efficiency and acceleration performance. BMW's engineering efforts focus on balancing weight and powertrain efficiency to offer a dynamic yet economical driving experience.

The 2025 BMW X3 (G45) features a ground clearance (ride height) ranging from 208 mm (8.2 inches) to 216 mm (8.5 inches). This moderate ride height allows the X3 to handle light off-road conditions and rough or uneven terrain with ease, providing confidence when driving on gravel roads, uneven city streets, or snow-covered roads. However, it remains primarily designed for on-road comfort and sporty driving characteristics rather than heavy off-roading like more rugged SUVs.

The luggage capacity of the 2025 BMW X3 (G45) ranges from 460 liters (16.2 cubic feet) with the rear seats upright, providing ample space for daily groceries or a few large suitcases. When the rear seats are folded down, cargo volume dramatically increases to between 1600 liters (56.5 cubic feet) and 1700 liters (60.0 cubic feet), allowing for the transportation of bulky items, sports equipment, or extended luggage for longer trips. This versatility makes the X3 suitable for both everyday use and weekend adventures.

Yes, the BMW X3 (G45) generally fits into a standard garage. Most standard single-car garages have dimensions roughly around 2.4 meters (7.9 feet) in width and 4.8 to 6 meters (15.7 to 19.7 feet) in length. With the X3's length of 4755 mm (187.0 inches or about 4.76 meters) and width of 1920 mm (75.6 inches or 1.92 meters), it fits comfortably within these confines. However, you should consider the additional mirror width of 2132 mm (83.9 inches) when opened, which may require careful maneuvering, especially in narrower garages.

Compared to its predecessor, the previous generation X3 (G01), the 2025 X3 (G45) has grown modestly in size. The G45 measures 4755 mm long, which is slightly longer than the G01's approximately 4710 mm length, offering improved interior space and luggage capacity. Its width remains similar but benefits from modern styling and aerodynamics. Height has stayed consistent, maintaining an ideal centre of gravity. Overall, the dimensional growth supports better passenger comfort and cargo versatility while retaining the agility expected of the X3 line.

In the competitive luxury compact SUV segment, the 2025 BMW X3 (G45) holds up well in terms of size. It is comparable to rivals such as the Audi Q5, Mercedes-Benz GLC, and Volvo XC60. While the X3 is slightly longer and offers competitive width, its luggage capacity with seats folded generally exceeds some peers, contributing to practicality. The moderate ride height and ground clearance also position it well for mixed driving needs. BMW's emphasis on sporty yet practical dimensions gives the X3 an appealing balance between urban maneuverability and interior spaciousness.

The BMW X3 (G45) offers a variety of rim sizes ranging from 18 inches to 21 inches, specifically: 8.5J x 19, 8J x 18, 10.5J x 20, 9J x 20, 10.5J x 21, and 9J x 21. Corresponding tire sizes include 245/50 R19, 225/60 R18, 285/40 R20, 255/45 R20, 285/35 R21, and 255/40 R21. Larger rims with lower-profile tires enhance cornering responsiveness, steering precision, and visual appeal but may lead to a firmer ride. Smaller rims with higher-profile tires offer improved ride comfort and better absorption of road irregularities, suitable for rougher roads or those prioritizing comfort over sporty dynamics.

The maximum roof load capacity for the BMW X3 (G45) is 100 kg (220 lbs). This means you can safely mount roof boxes, bike racks, or other cargo carriers without risking damage to the roof or affecting vehicle stability. When loading the roof, it’s essential to distribute weight evenly and secure the cargo properly to maintain safe handling characteristics. Exceeding the roof load limit can lead to compromised driving safety, increased wind noise, and potential structural damage, so adhering to this limit ensures optimal vehicle performance and durability.