Earlier today, Germany’s Auto Moto und Sport published an article suggesting that a BMW Z4 with the S58 engine was in the works for the final iteration of the current generation. Similar rumors had previously surfaced regarding the Toyota Supra, but none of them materialized. Unfortunately, according to our reliable sources, BMW has no plans to equip the Z4 with the S58 engine.

Why No BMW Z4 M?

In 2023, we had the opportunity to speak with Michael Wimbeck, the head of the Z4 project, about the absence of a BMW Z4 M. Wimbeck explained that, first and foremost, there wasn’t sufficient demand in the market for a BMW Z4 M. Although BMW extensively explored the possibility, creating a Z4 M would involve more than simply swapping in the twin-turbocharged S58 engine from the M3/M4. The differences between the S58 and its B58 counterpart, particularly in the braking system, presented significant challenges.

The S58 engine features the M Integrated Braking System, a sophisticated module that offers precise brake adjustments and two distinct pedal feel settings. Integrating this advanced braking system into the Z4, along with the necessary cooling modifications, proved to be too complex for a low-volume car.

Small, Declining Market

Furthermore, BMW recently introduced a Z4 M40i with a six-speed manual transmission, known as the Handschalter. Even the investment in this particular project was substantial for a car expected to have limited sales. Additionally, as BMW plans to cease Z4 production in 2026, the same as Toyota with their Supra, the window for developing a new product like an S58-powered BMW Z4 M is closing rapidly.

Therefore, despite our enthusiasm for the idea of another remarkable BMW Z4 M Roadster, the prospects seem unlikely. In the meantime, stay tuned for our review of the 2024 BMW Z4 M40i, a vehicle we believe represents the best value in the current BMW lineup.