2024 BMW Speed Limit Warning Reverts TSB 66 07 25

Owners of certain 2024 BMW models may notice that their custom-set speed limit warning automatically reverts to a lower value after the vehicle has been in an extended sleep cycle. This unexpected change means the vehicle does not retain the driver's preferred setting for the speed limit warning feature, which can be inconvenient and potentially lead to missed warnings.

Symptoms

The primary symptom of this issue is the automatic resetting of the speed limit warning's adopted speed. After an extended period where the vehicle enters a sleep cycle, the customer-defined setting for the "Warning for speed limits" feature will revert to a lower, default value. This means that if you set your vehicle to warn you at a specific speed above the limit, that setting will not be retained.

Fault Codes / OEM Fault Labels

While no specific Diagnostic Trouble Codes (DTCs) are listed in this bulletin, the underlying issue is identified by BMW as an "Instrument cluster control unit Software error / internal device fault." This fault is associated with repair code 6210030200, indicating a software problem within the Kombi (instrument cluster) module.

Diagnosis / Trigger Conditions

The issue occurs after the vehicle has been in a sleep cycle for an extended duration. To diagnose the problem, a BMW technician will determine the vehicle's current I-level (software integration level) using diagnostic tools such as AIR, ISTA, or the Key Reader/AWP applications. If the I-level is found to be lower than version 25-03-550, the vehicle is susceptible to this fault.

Important Warnings

• Do not program the vehicle if its current I-level is equal to or greater than 25-03-550. In such cases, technicians should continue with standard diagnosis using ISTA.
• Always connect a BMW-approved battery charger/power supply (refer to SI B04 23 10) to the vehicle during programming to ensure a stable power supply and prevent issues during the software update process.

Repair Procedure Summary

The correction for the 2024 BMW speed limit warning issue involves updating the Kombi software. If the vehicle's I-level is lower than 25-03-550, the technician will perform the following steps:

1. Connect a battery charger to the vehicle to maintain power during programming.
2. Connect the programming system (ISTA 4) to the vehicle.
3. Determine the necessary measures plan for the software update.
4. Execute the measures plan, programming, encoding, and enabling all relevant control units.
5. Follow any rework lists and perform a vehicle test.
6. Clear any fault memory if needed.

The vehicle will be programmed to I-level 25-03-550 or higher, using ISTA 4.53.2x (released May 9, 2025) or a newer version. After the programming is complete, the functionality of the system will be checked to ensure the 2024 BMW speed limit warning setting is retained.

Required Tools or Parts

The primary requirement for this repair is a BMW-approved battery charger/power supply to ensure stable voltage during the software update. The diagnostic and programming software, ISTA 4.53.2x or higher, is also essential.

Owner Action

If you own a 2024 BMW and experience your speed limit warning settings reverting, you should contact your authorized BMW dealership. Explain the issue and mention BMW TSB 66 07 25. The software update will be performed under warranty, provided the vehicle meets the specified conditions.

Source: NHTSA ID: 11018732, Manufacturer Communication Number: 66 07 25