Causes of Internal Failures in BMW DME Control Unit?
1 Answers
Multiple failures in BMW vehicles may be related to defects in the DME control unit. The product defects in BMW's DME control unit (Digital Motor Electronics) could be the direct factor leading to frequent BMW malfunctions. Common issues include warnings for the DSC body stability system, transmission failures, drivetrain faults, and tire pressure monitoring failures. The DME control unit has two major defects: 1. Poor electromagnetic compatibility, making it susceptible to electromagnetic interference: Poor electromagnetic compatibility can lead to multiple warning lights, reduced power, and other issues. Although BMW's electronic engine ignition system has independent ignition coils, the driving module is designed within the DME control unit. During engine operation, the ignition circuit transmits high currents to drive the ignition coils at high frequencies, resulting in electromagnetic interference. 2. Susceptibility to temperature effects: The direct consequences of temperature impact on the DME are engine stalling and unstable RPM. In normal data streams for new vehicles, the DME operates correctly at 81°C. However, due to the poor high-temperature resistance of internal components, the engine begins to shake when the temperature reaches 65°C after prolonged use, and it stalls immediately at 71°C.