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Starting problem and error 4A63 after battery change on BMW E93

Hello everyone, I own a BMW 3 Series E93 and I've been having a problem since changing the battery. The car no longer starts and has gone into safe mode. I also have a 4A63 error displayed. Could someone help me understand how to clear this error and resolve the starting problem? Thanks in advance for your valuable help.

(Translated from French)

After changing the battery on a BMW E93, the car fails to start and displays a 4A63 error, indicating an EWS (Electronic Immobilizer) issue. Possible causes include improper battery connection or a need to reset the EWS. Suggested solutions involve ensuring the battery is fully charged and properly connected, resetting the EWS by disconnecting the battery for 15 minutes, or re-syncing the EWS with the DME using a diagnostic tool.

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The 4A63 error code typically relates to an EWS (Electronic Immobilizer) issue. First, ensure the new battery is properly connected and fully charged. Then, try resetting the EWS by disconnecting the battery for about 15 minutes and reconnecting it. If the problem persists, you may need to re-sync the EWS with the DME (Digital Motor Electronics) using a diagnostic tool. Let me know if this helps or if you have any further questions!

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BMW

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