MS40 was a new ECU for BMW, manufactured by Siemens instead of the previous Bosch Motronics. M3.3.1 included VANOS control, and is used on M50 engines with VANOS, introduced to the E34 and E36 in 1992. The M3.3 family were used to run the later 3.8 litre S38b38, the S50 3.0 M3, and the M60 V8s. M1.7.2 was used for the M42 and M43 4 Cylinders. The M3.1 is a 6cyl ECU, used on the early M50 24v engines without VANOS. Was used solely for the S70, used in the BMW 850CSi. The M1.7 was used on the M40, M42 and M70, the M1.7.1 The Motronic 1.7 and subfamilies, and the M3 and it’s variants are the next generation of BMW ECUs. M1.1 and M1.3 was used on the M20, M30 and M40 engines, whilst M1.2 was used on the S38 and M70, which are the early E34 M5 engines and the early V12s. The BMW DME M1.1 (and similar, 1.2 and 1.3) is an early Bosch Motronic ECU, used on all of the 6 Cylinder BMWs up until 1990, and a few more after that. To search for your code, follow the list below, or press ctrl+f to search within this page.Īll codes from DDE4 onwards are listed as the HEX value. Hex format is a hexadecimal number, used by computers to count in base 16, so there are 16 numbers before “10”, instead of our ten. The code reader or diagnostic tool will ask the module for any stored codes, and it will receive a number in hex format. If you don’t recognize the codes, this list will help you. If you are reading codes from specific BMW modules, you may find you get a code. Most of BMW diagnostic softwares like DIS, INPA, EDIABAS, IBUS, CANBUS, CARSOFT, give an error code but no or limited explanation.

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