ECU Identification

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Bosch/BMW ECUs have a hardware part number beginning with “0 26(0/1)” and ending with 6 digits. The final three digits of that number are commonly referred to as the “ECU Number” or “DME Number”. These last three digits are the numbers you will use to identify which ECU you are running.

Below, the hardware part number and colloquial “ECU/DME Number” are outlined.

The part number (red) and colloquial ECU number (yellow) are outlined.

Some examples are:

BMW E23/E24/E28 M88 "055" ECU
BMW E30/34 325i/525i “173” ECU
BMW E30 318i “175” ECU
BMW E30/34 325i/525i “524” ECU
BMW E30/34 325i/525i “525” ECU
BMW E34/36 M50/S50 “413” ECU