2021-2024 BMW Alarm System Not Active SIB 65 34 23

Symptoms

Owners of affected BMW vehicles may observe that the alarm system (DWA) is not active after locking their unoccupied vehicle. This can manifest in several ways:

• There may be "no acoustic or optical confirmation (folding the mirrors/blinking confirmation) is noticeable" when locking the vehicle.
• The red anti-theft alarm LED in the interior mirror does not briefly flash every 2 seconds, which typically indicates the alarm is armed.

These symptoms indicate a malfunction with the vehicle's security system, specifically that the BMW alarm system not active as expected.

Cause

The root cause of the BMW alarm system not active issue has been identified as software errors within the Headunit High (HU-H) control unit.

Important Warnings

Do not replace parts to address this issue. BMW explicitly states that "Parts replacement will not provide a solution." The problem is software-related and requires a programming update.

Repair Procedure Summary

To correct the BMW alarm system not active condition, technicians must perform a programming and encoding procedure on the vehicle. The steps involve:

1. Determine Current I-level: Technicians will first determine the vehicle's current integration level (I-level) using BMW's diagnostic applications, AIR or AWP (Aftersales Workplace).
2. Check Target Integration Level: The current I-level is compared against specific target integration levels. If the vehicle's I-level is within an older range, it needs to be updated. For example, for G05, G06, G07, G09 models, the I-level should be S18A-23-11-530 or higher. Similarly, G60 and G70 models require G070-23-11-530 or higher, i20 models need I020-23-11-530 or higher, and U11 models require U006-23-11-530 or higher.
3. Program Vehicle: If an update is required, the vehicle must be programmed using ISTA 4.44.3x or a newer version, which was released on November 14, 2023.
4. Functionality Check: After programming, the technician will verify that the alarm system functions correctly.

During this process, it is crucial to always connect a BMW-approved battery charger/power supply, as outlined in BMW Service Information Bulletin (SIB) B04 23 10, to maintain stable voltage.

Required Tools or Parts

This repair primarily involves software updates and diagnostic procedures. The key requirements are:

• ISTA 4.44.3x or higher: BMW's integrated service technical application for diagnostics and programming.
• BMW-approved battery charger/power supply: Essential for maintaining vehicle voltage during programming, as specified in SI B04 23 10.

No physical parts are required for replacement to resolve this specific software error.

Warranty Information

This programming and encoding repair, identified by Repair Code 6512580200 (Head Unit High HU-H Software error / internal device fault), 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. Owners should not incur charges for this specific software update.

Owner Action

If you experience the symptoms described, such as your BMW alarm system not active after locking, you should schedule an appointment with an authorized BMW dealer. The dealer will perform the necessary diagnostic checks and apply the software update as per SIB 65 34 23 to resolve the issue.

NHTSA ID: 10245422