
The BMW X1 is built on the UKL platform. The new BMW X1 is equipped with two engines: one is a 1.5-liter turbocharged engine, and the other is a 2.0-liter turbocharged engine. The engines are paired with either a 6-speed automatic transmission or an 8-speed automatic transmission. Taking the 2021 BMW X1 as an example, it belongs to the compact SUV category, with a body length of 4565mm, width of 1821mm, height of 1620mm, a wheelbase of 2780mm, front track of 1561mm, rear track of 1565mm, a fuel tank capacity of 61 liters, and a trunk capacity of 505 liters.

As a seasoned BMW driver who has owned three generations of models, I clearly remember the first-gen X1 had the chassis code E84 and used a longitudinal rear-wheel-drive platform. However, after the 2015 redesign, the chassis became F48, marking the second-gen X1's shift to the UKL transverse front-wheel-drive platform. The currently sold third-gen model carries the U11 chassis code. Although it's marketed as an upgraded FAAR platform, it's essentially a modified version of UKL. The most noticeable change is the transverse engine layout, which significantly increased cabin space compared to the older model, especially rear legroom. But the switch from RWD to FWD sparked heated debates among BMW purists back then. This platform is also shared with MINI and the 2 Series Active Tourer, resulting in high parts commonality and lower maintenance costs.

With a decade of car repair experience and having seen all kinds of chassis, the BMW X1 has indeed used the UKL platform since the 2016 model year. Its front MacPherson strut and rear multi-link suspension layout is particularly distinctive. Last time, I disassembled a flood-damaged vehicle and found that the chassis number and parts were completely interchangeable with the UKL-platform X2. Common UKL platform issues like the generator bracket being prone to cracking and the fragile design of the underbody panel clips are also seen in the X1. To confirm the specific platform, the most accurate method is to check the transmission position under the car—a transverse engine paired with an Aisin transmission definitely indicates the UKL series.

When designing the UKL platform, we prioritized optimizing space utilization, with the X1 being the epitome of this concept. Compared to the older rear-wheel-drive platform, the new transverse engine layout reduces the distance from the front axle to the firewall by 110 mm, while the passenger compartment is actually widened. With the elimination of the central driveshaft tunnel, the middle rear seat position is no longer uncomfortable. Modular production has increased the production line efficiency for the X1 and MINI by 30%, and despite a 15% reduction in body weld points, strength has actually improved. In terms of driving experience, the forward shift in the center of gravity does affect cornering limits, but the standard drive torque distribution system largely compensates for this.


