Siemens MS 40 Engine ECU Repairs

Siemens MS40 Engine ECU RepairsType: Siemens Engine Management
Fits: BMW 320i / 520i
Engines: E34 / E36
Year: 1993 – 1998
Ref: ECUT323195

Note: This ECU may also fit other models.

It is a Siemens MS 40 ECU and we are able to fully test and rebuild these units.

Common part numbers associated with this type of unit

Siemens NumberOEM NumberPriceWarranty
5WK9 0021 739 855£POA12 months
5WK9 0031 744 597£POA12 months

We are able to fully test and rebuild these ECU’s with a 12 months warranty and all within a fraction of the price of a new unit. Our typical turnaround time for this type of ECU is just 3-5 working days. If you’re unit is found to be faulty and cannot be repaired, we may be able to offer a replacement unit and code it to your vehicle – making it fully plug & play.

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