BMW DME/ECU: 30BA & 30BB Faults and Fixes
Whilst in most cases manufacturers refer to the Engine Control Unit as an ECU, BMW chose to use the phrase DME.
Digital Motor Electronics, which explains why the 30BA & 30BB is described as "DME Digital Motor Electronics, Internal Failure"
It's an issue that affects the Siemens VDO DME MSD80 ECU fitted to a variety of 2000s BMW models.
In which BMW models do fault codes 30BA and 30BB occur?
- BMW 1 Series E81, E82, E87, E88 (2004 – 2011)
- BMW 3 Series E90, E91, E92, E93 (2005 – 2012)
- BMW 5 Series E60, E61 (2003 – 2010)
- BMW 6 Series E61, E64 (2004 – 2010)
Symptoms of fault codes 30BA and 30BB
When fault codes 30BA and 30BB occur, the following symptoms may be seen
- Loss of power: The engine does not operate at full power during acceleration
- Irregular performance: jerky or irregular idling
- Engine malfunction light: The engine management light (MIL) comes on
- Starting problems: the engine struggles to start or sometimes does not start at all
- Increased fuel consumption: inefficient combustion increases consumption
Often, fault codes are also read, indicating misfires or injection problems.
Solution for fault codes 30BA and 30BB on BMW
In most cases, the cause of fault codes 30BA and 30BB lies with the Siemens VDO DME MSD80 ECU. This ECU fails due to thermal stress and wear. Remanufacture of the Siemens VDO DME MSD80 is therefore the solution.
ACTRONICS offers an effective overhaul solution for the Siemens VDO DME MSD80, where the ECU is thoroughly tested and fitted with new components to ensure long life and reliable operation. Still have questions? Then feel free to contact us!