The 2025 BMW M4 CS is a more street-friendly version of the M4 CSL unveiled in 2022, but it doesn’t mean it’s less capable of inducing a wide, silly grin to those who could plunk down $125,000 for what could be the most balanced M4 of all. Like the M4 CSL, BMW engineers focused on reducing weight for the all-new CS. It utilizes carbon fiber-reinforced plastic (CRFP) for the hood, front splitter, air intakes, mirror caps, rear diffuser, and the Gurney-type rear spoiler to weigh about 77 lbs. less than an M4 Competition xDrive. The same material is in the structural elements of the seat cushions and backrests of the standard M Carbon bucket seats. At the same time, the center console and interior trim feature a CFRP construction to emphasize weight savings.