2025 Audi A3 Airbag Warning Lamp TSB 2081452/1
Audi has released Technical Service Bulletin (TSB) 2081452/1 for the 2025 Audi A3, addressing an illuminated airbag warning lamp in the instrument cluster. This issue is typically caused by event memory entries related to belt switch short circuits, such as B104212, and requires an airbag control…
Ahmet Topcu2025 Audi A3
Symptoms
Owners of a 2025 Audi A3 may observe the 2025 Audi A3 airbag warning lamp illuminated in the instrument cluster. The customer typically states: "The warning lamp for the safety systems (airbag warning lamp) is lit up in the instrument cluster." This indicates a potential issue with the vehicle's safety systems.
Fault Codes / DTCs
When the airbag warning lamp is illuminated, a workshop diagnosis may reveal one or more of the following event memory entries logged in the airbag control unit (diagnostic address 0015):
| Code | Description |
|---|---|
| B104512 | Driver side belt switch, 3rd row Short circuit to B+ |
| B104612 | Center third row seat belt switch Short circuit to B+ |
| B104712 | Passenger side third row seat belt switch Short circuit to B+ |
| B104212 | Driver's side belt switch, 2nd row Short circuit to B+ |
| B104312 | Center second row seat belt switch Short circuit to B+ |
| B104412 | Front passenger side second row seat belt switch Short circuit to B+ |
These codes specifically point to short circuits in various belt switches within the vehicle's safety system.
Diagnosis and Technical Background
The presence of the fault codes listed above confirms the issue. The underlying cause for the illuminated 2025 Audi A3 airbag warning lamp and associated DTCs is identified as a software issue within the airbag control unit (diagnostic address 0015). Audi has developed an optimized software solution, which was introduced into current series production in the second quarter of 2025.
Important Warnings for Owners
For 2025 Audi A3 vehicles equipped with high-voltage components, it is critical to unplug the high-voltage charging cable before the SVM code is entered for the software update. Charging the high-voltage battery during this process can cause damage to the high-voltage components.
Owners should also be aware that if they decline the software update, this could lead to issues or restrictions with the use of the vehicle or individual components. If the software has been modified by third parties (e.g., tuning or retrofitting), this update may neutralize those previous modifications.
Repair Procedure
To resolve the illuminated 2025 Audi A3 airbag warning lamp and clear the associated fault codes, the airbag control unit software must be updated. This involves performing a software update on the airbag control unit (diagnostic address 0015) using the SVM code 15A015. A qualified technician will start the update on a workshop tester by selecting 'flash' and then entering the specified SVM code. The technician must follow all instructions provided by the tester during this process.
Warranty Details
This Technical Service Bulletin (TSB 2081452/1) outlines the warranty claim information for this repair. If the vehicle is outside of its warranty period, this TSB serves as informational guidance only. The service number associated with this procedure is 6953, and the damage code is 0039. Labor operations for the software update include codes 0151 0010 (referencing the Service Repair Time (SRT) with associated operations) and 0151 0060 (with time stated on the diagnostic protocol). All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual.
Owner Action
If your 2025 Audi A3 is displaying the airbag warning lamp, it is recommended to visit an authorized Audi service center. Inform the service advisor about the illuminated 'airbag warning lamp' and reference TSB 2081452/1. The software update is the prescribed remedy for this issue. Be prepared to discuss any prior software modifications to your vehicle, as the update may neutralize them.
NHTSA ID: 2081452/1
Frequently Asked Questions
- What does an illuminated airbag warning lamp mean in my 2025 Audi A3?
- An illuminated airbag warning lamp in your 2025 Audi A3 typically indicates a fault within the vehicle's safety restraint system. According to TSB 2081452/1, this is often due to a software issue causing belt switch short circuit fault codes like B104212 to be logged.
- What is the fix for the airbag warning lamp issue in the 2025 Audi A3?
- The primary fix is a software update for the airbag control unit. This update, performed using SVM code 15A015, addresses the underlying software issue that causes the belt switch short circuit fault codes and the illuminated airbag warning lamp.
- Are there any special precautions for the software update on high-voltage Audi A3 models?
- Yes, for 2025 Audi A3 vehicles equipped with high-voltage components, it is crucial to unplug the high-voltage charging cable *before* the SVM code is entered for the software update. This prevents potential damage to high-voltage components that could occur if the battery charges during the update process.
- What happens if I decline the software update for my Audi A3's airbag system?
- If you decline the software update, you should be aware that this could lead to issues or restrictions with the use of your vehicle or individual components related to the airbag system. It's important to discuss these implications with your service center, as the update may also neutralize any prior third-party software modifications.
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