Only then, can we successfully exchange and swap a used ECU to work in another BMW car. We can reprogram a used ECU using another VIN number and reset the Rolling Code, virtually making the unit "virgin". ![]() However, we’ve found a way to work around this. This makes it virtually impossible to swap used ECU's between BMW cars. If the VIN number isn't consistent, the car will not start.Īlso the EWS has a password feature called the "Rolling Code" which changes between the modules every time that the car is turned off. This module compares the VIN number of the car between different electronic modules in the car. The new anti-theft technology is a device called the "EWS", which is also known as the "Immobilizer". How can you help me?Įver since December of 1994 BMW added a new Engine Management technology as an anti-theft measure. My mechanic/dealership says that you can’t reprogram, re-code, or swap a used BMW ECU between cars. ![]() We hope to help answer and give you solutions to the most commonly asked questions. There are many "myths" and misunderstandings about BMW ECU / DME reprogramming.
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