Diesel-powered M5 is slated for launch in the spring of next year and will feature a tri-turbo 3.0 liter oil-burning unit.

The Detroit Bureau is reporting that BMW sources are saying that the tentatively named BMW 550dXM is definitely slated for a debut next spring.

The 550dXM will be coming from BMW's M division and will represent a diesel M5. The report says the 3.0 liter, tri-turbo diesel unit will deliver somewhere between 500 PS (368 kW / 493 bhp) and 550 PS (405 kW / 543 bhp) with a torque rating exceeding the 680 Nm (502 lb-ft) of torque of the current gasoline-powered M5.

But BMW M division's global marketing manager, Brian Watts, won't yet confirm the model is a sure go, although, he admits the automaker is considering the option.