2021 BMW 12-Volt Power Socket Malfunction TSB

Symptoms

Owners of certain 2021 BMW vehicles may experience problems with the front 12-volt power socket. The primary symptom is that connected accessories "Accessories do not power on" when inserted into the socket. In some cases, the accessory may "only operate when constant downward hand pressure is maintained" on the plug adapter.

Diagnosis

This issue stems from a design characteristic of the 12-volt power socket. When a plug adapter is inserted, the center contact pin within the adapter may not establish proper electrical contact with the center pin of the power socket. This lack of contact prevents power from being supplied to the accessory.

Repair Procedure Summary

BMW implemented a design change to the 12-volt power socket to address this issue. This change was intended to reduce occurrences of short circuits and blown fuses, as well as improve contact reliability. If your vehicle exhibits the symptoms described, the repair will likely involve replacing the affected front 12-volt power socket with the updated design to ensure proper accessory function.

Owner Action

If you own a 2021 BMW 330i or another affected 2021 BMW model and are experiencing issues with your front 12-volt power socket, it is recommended to contact your authorized BMW dealer. Inform them about the symptoms you are experiencing with your 2021 BMW 330i manufacturer_communication and refer to manufacturer communication NHTSA ID 10182618. The dealer can diagnose the problem and perform the necessary repair, which typically involves replacing the 12-volt power socket with the redesigned component.

This information is based on manufacturer communication NHTSA ID 10182618.