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New Key cannot be Registered [12/2017 - 10/2022]: Description

If a new electrical key transmitter sub-assembly could not be registered, wave interference or a malfunction of the certification ECU (smart key ECU assembly), electrical key transmitter sub-assembly, ID code box (immobiliser code ECU), steering lock ECU (steering lock actuator with ECU assembly) or door control receiver assembly is suspected.

The registration procedure to add another electrical key transmitter sub-assembly (without replacing any parts) is called "additional key ID registration".

If additional registration is not possible, refer to Additional Key cannot be Registered.

Refer to Additional Key cannot be Registered [12/2017 - 10/2022] 

HINT: 

If any of the following have been performed, registration of all electrical key transmitter sub-assemblies is necessary: 

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