2021-2024 BMW Bluetooth Malfunctions SIB 65 28 23

BMW has issued Service Information Bulletin SIB 65 28 23 to address a range of BMW Bluetooth malfunctions and disconnections affecting the HU-H4 head unit in various 2021-2024 BMW models. This bulletin provides diagnostic steps and a software update procedure for technicians to resolve these connectivity problems.

Symptoms of BMW Bluetooth Malfunctions

Owners of affected BMW vehicles may observe one or more of the following issues related to Bluetooth functionality:

• "Bluetooth cannot be switched on or off in the head unit (HU-H4)"
• "Paired mobile devices cannot be deleted"
• "Customer is unable to make phone calls or stream music with mobile device"
• "Customer is unable to connect a new mobile device via Bluetooth"
• "Mobile device does not automatically reconnect via Bluetooth in the next drive cycle (after short sleep cycle)"

Cause of the Issue

The root cause of these BMW Bluetooth malfunctions has been identified as unfavorable software within the vehicle's head unit, specifically the HU-H4 (Head Unit High, Nav Professional).

Diagnosis and Repair Procedure

To correct the BMW Bluetooth malfunctions, the head unit (HU-H4) requires programming with updated software. The repair procedure involves several steps for technicians:

I-Level Check

First, a technician will determine the vehicle's current I-Level using applications like AIR or the Key Reader/AWP. If the I-Level is already at version 23-07-540 or a more recent version, the vehicle should not be programmed, and standard diagnosis should continue.

Manual Head Unit Reset

If the vehicle's I-Level is lower than 23-07-540, a manual head unit reset must be performed. This is done by continuously pressing the volume control knob for 30 seconds.

Software Programming

Following the reset, the vehicle's head unit will be programmed to I-level S18A/I020/U006-23-07-540 or higher. This programming must be performed using ISTA 4.43.1x (released August 2023) or a newer version. The process involves connecting a battery charger and the programming system (ISTA 4) to the vehicle. The technician will then determine and accept a measures plan, ensuring all control units are programmed, encoded, and enabled. A rework list must be followed, and a vehicle test performed, with any fault memory deleted as needed.

Important Notes for Technicians

• Do not program the vehicle if its I-Level is already at 23-07-540 or a more recent version. In such cases, continue with standard diagnosis.
• Always connect a BMW-approved battery charger/power supply, such as those referenced in SIB 04 23 10, to the vehicle during programming to maintain stable voltage.
• ISTA will automatically reprogram and code all programmable control modules that do not have the latest software during this process.

Warranty Coverage and Repair Code

This software solution is covered under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks or the BMW Certified Pre-Owned Program. The repair code associated with this service is 6512580200, described as "Head Unit High HU-H (Nav Professional) Software error / internal device fault."

Labor operations such as 00 00 006, 00 00 556, 61 21 528, 61 00 006, 00 58 500, and 61 00 730 are specified for claiming this repair. Technicians should refer to SI B01 01 20 or B01 07 20 for guidance on documenting diagnosis work time.

What Owners Should Do

If you are experiencing any of the described BMW Bluetooth malfunctions in your 2021-2024 BMW, it is recommended to schedule an appointment with an authorized BMW dealership. They will be able to diagnose the vehicle's current software I-Level and perform the necessary head unit programming to resolve the issue under warranty.

NHTSA ID: 10242874