When the Telematics Control Unit (TCU) replacement is necessary due to a failure, use MDARS to activate...

Bulletin number

SA-025-23a

Component

Electrical system

Summary

When the Telematics Control Unit (TCU) replacement is necessary due to a failure, use MDARS to activate the new TCU after replacement. Use the information in this service alert to initialize the new TCU until the procedure on MGSS is updated.. CAUTION: DO NOT swap TCU with another vehicle as the TCU is VIN locked after activation. A TCU swap with another vehicle will disable Connected Services on both vehicles. If TCU activation is not performed, connected vehicle functions will not operate. This will have a negative impact on the customer because they will need to return to the dealer for repairs.

Owners of these vehicles have filed 166 complaints in the electrical category.