The DSC module sends torque reduction requests to the DME during cornering, braking, or wheel slip. If the DSC yaw rate sensor, steering angle sensor, or brake pressure sensor gives erratic data (e.g., due to a failing DSC pump or hydraulic unit), the DME triggers D52C44 as a fail-safe.
or a software glitch. In modern BMWs, the energy management system is so precise that even a slightly aging battery can cause sensitive modules to report "invalid" data. A Tale of Two Systems bmw error-d52c44
BMW systems are extremely sensitive to voltage drops. If your battery is over 4–5 years old, a low state of charge can cause "ghost" communication errors like D52C44. The DSC module sends torque reduction requests to
Depending on whether the code is "shadowing" (stored in history) or active, you may experience: In modern BMWs, the energy management system is