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Hi i currently own a 2002 E46 325ci and am running into and issue with getting it starting. We have traced the issue back to the EWS (Immobilizer / Anti-Theft) and it just seems to not be sending power to the starter afterwards. Originally the car would turn over and start fine then at some point someone unplugged the immobilizer. Having plugged it back in the car is not turning over, the starter is fine as a shop tested it and the wiring to the starter is also fine. Is there any way to maybe reprogram the key so its no longer locked, or check to see if somehow the immobilizer is dead (no power)? or any other things i could try.


Additional Notes:
Manual Transmission
Original ECU
 

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Most of the BMW cars come with an inbuilt computer system that controls all the things in the car. After every service, you need to reset the battery. Also, you need to reset the computer after you have successfully changed the battery. The reason behind this is your BMW car's inbuilt computer stores all the electric energy. So there is a need to reset the computer after every successful service or after every successful battery change. For more information, read this guide about How to Reset BMW Computer After Battery Change.
 
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