Does the BMW X4 have frameless doors?
2 Answers
BMW X4 does not have frameless doors. BMW models with frameless doors include the BMW 2 Series, BMW 4 Series, BMW Z4, BMW 3 Series GT, BMW 5 Series GT, and BMW i3. Advantages of frameless doors: They look stylish and sporty, with good sound insulation. The frameless door system automatically lowers the window by 0.5 cm when opening the door, and raises it to seal against the weatherstrip after closing. Since the weatherstrip is installed on the car body, the sealing performance is excellent. Disadvantages of frameless doors: Compared to conventional framed doors, frameless doors have higher manufacturing technical requirements, such as for sound insulation and waterproofing, resulting in higher production costs. The complex technology also increases failure rates and maintenance costs. For example, with frameless doors, only the door panel bears the load, which over time can cause loosening of window or door panel components, leading to air and water leaks. Therefore, their durability is not as good as that of framed doors.
I've driven my friend's BMW X4, and the doors indeed don't feature a frameless design. As a crossover coupe SUV, it retains the traditional window frame structure, which results in significantly less wind noise at high speeds compared to frameless doors. One time during heavy rain on the highway, I clearly noticed the better sealing of the window frames. Frameless doors are more commonly found on the 4 Series coupe or X6, while the X4 focuses on balancing sporty styling with practicality. If you're particularly fond of frameless doors, you might want to check out the 4 Series Gran Coupe—that sloping roofline paired with frameless doors does look much more stylish.
