The 2001 BMW M3 has 4 recalls, the most serious being Takata airbag inflators on both the driver and passenger sides that can rupture in a crash, sending metal fragments into the cabin and causing serious injury or death.
The airbag concern covers both frontal inflators: the driver-side inflator can explode and throw metal fragments toward the driver or other occupants, and the passenger-side inflator carries the same risk. Prior repair attempts did not fully resolve the issue for all affected vehicles, which is why multiple campaigns exist for what is essentially the same defect. On the mechanical side, the parking brake cable mounting bracket may have been secured with screws that were not properly tightened. Those screws can work loose and fall into the parking brake drum, freeing the bracket and leaving the parking brake unable to hold on that side of the vehicle.