The electronic control unit BMW DME 7568842 (MSD80- MSV80/ Siemens 5WK93608 is used in most BMW petrol engines (E60, E90, E87, X3, X5, etc.).
This module controls injection, ignition, mixture and overall engine operation.
One of the most common problems with this DME is errors:
30BA / 12474 - Internal failure of injectors 1, 2, 3 or DME
30BB / 12475 - Internal failure of injectors 4, 5, 6 or DME
These errors usually suggest a serious injector management problem and require professional intervention.
Error 30BA / 12474 - Problem in control of injectors 1, 2 and 3
This is one of the most common malfunctions with this type of DME.
The error means that the module is reporting an incorrect control, drift, or internal conflict in the channels controlling the first three injectors.
How does the problem feel?
strong vibrations
operation of "three cylinders"
acceleration bandwidths
power loss
"Check Engine" is on
emergency mode
What could be the reasons?
internal fault in DME
impaired control to injectors
overloading of control circuits
problems after a removed mass or tension drop
The error does NOT necessarily mean a faulty injector - often the problem is in the control from the module.
Error 30BB / 12475 - Problem in control of injectors 4, 5 and 6
This error is completely analogous to 30BA, but for the second block of injectors (4-6).
Symptoms:
loud engine vibration
uneven operation
smell of unburnt fuel
high cost
limited power
switching to emergency mode
Reasons:
internal problem in the DME unit
unstable voltage
injector group overload
poor connection between DME and engine
In most cases, replaced injectors or coils do not solve the problem because it comes from the control.
Why are these errors almost always associated with DME?
In this Siemens model, situations occur where the DME:
does not correctly distribute the control signal
does not feed the right pulses to the injectors
enters protective mode
reports internal deviation
For this reason, the problem often returns even after changing injectors or repairs to the installation.
