The current generations of the BMW M3 (G80) and BMW M5 (G90) have established themselves as benchmarks for dynamics and high-tech performance in the sports sedan class. However, while their power is undeniable, their design often causes heated debate among the Bavarian brand's most loyal fans. Of particular note is the place where the side doors seemingly end abruptly before meeting the massive, flared rear arches.
For many, this architectural detail seemed like an oversight or even a design flaw, but BMW M division head Frank van Meel put an end to speculation by categorically defending this decision, explaining it as a completely deliberate stylistic choice.
According to Van Meel, the key element in the design are the aggressively flared rear arches. They are designed not only to accommodate the wider tires and improve stability, but also to give the G80 M3 and G90 M5 models a distinctive, almost racing-like appearance that immediately sets them apart from the standard versions. The goal is for the silhouette itself to "scream" the car's high performance.
Van Meel explains that the designers made a conscious decision to keep the standard shape of the rear doors, rather than reworking them so that they merge smoothly with the bulging arches. This visual contrast was needed to further emphasize the solidity and muscular appearance of the rear. The contrast between the plane of the doors and the elongated wing creates an association with thoroughbred racing machines, where such rough geometry emphasizes width and stability.
According to the head of BMW M, it is this "less smooth, but much more emotional" visual difference that makes the M3 so expressive and "cool". This is a way for the car to demonstrate its "pure power" without hiding it with unnecessarily elegant lines.
An interesting parallel can be drawn with the BMW M4 Coupe. Since the coupe has a solid side panel instead of rear doors, engineers were free to integrate the flared arches in a much more harmonious and sculptural way. As a result, the M4 creates a more homogeneous and elegant visual perception, despite sharing a similar architecture with the M3 and M5. This example proves that BMW could have achieved a smoother line in the sedans, but consciously chose a more dramatic and contrasting approach.
Although BMW is already working on a facelift for the M3 family, and the next generation (G84) is expected in late 2027 or early 2028 under the new Neue Klasse design philosophy, the controversial rear line will remain a characteristic feature of the current models. BMW is clearly ready to provoke debate as it seeks a balance between tradition, aggression and modern art.