Audi SOS System B105413
“Emergency call function fault. Function partially available. Please contact workshop.”
Mr P wasn’t prepared for a message like this on the dashboard of his Audi A1, and it immediately set alarm bells ringing.
A red SOS light had appeared in the roof console, confirming that a built-in safety feature was no longer fully operational.
No matter what car you drive, an emergency call warning isn’t something you can afford to leave.
This is the system designed to automatically place an emergency call following a serious collision. If it stops working, you’re left without a safety feature you’ve most likely never had reason to question.
Looking for a definitive answer, Mr P took his Audi A1 to RS Autotechnik, Dursley, to have the fault thoroughly assessed.
Below, you’ll find out how our Audi specialists traced the fault, what our investigation confirmed, and how the Audi SOS fault fix was carried out.
How RS Autotechnik Investigated the Audi SOS System B105413 Fault
Once Mr P arrived at RS Autotechnik, Dursley, our Audi specialists started by listening carefully to his account of the issue.
Understanding what a customer has experienced is a crucial first step in every investigation at our garage, helping our team direct their efforts where they’ll count most. Mr P told us that an emergency call fault message had appeared on his dashboard and that the SOS light in the roof console had gone red.
There were no other faults with the vehicle, no work had recently been carried out, and no clear trigger for the warning.
With that context in place, our Audi technicians proceeded with the opening checks.
Our initial checks covered:
- A comprehensive visual inspection to spot any evident signs of damage.
- A system scan to capture any stored or present fault codes.
Nothing stood out during the visual inspection. Every component appeared to be in good order, with no apparent damage. With that stage complete, our team turned to the system scan.
The system scan was performed using Audi manufacturer-level technology, and live data from the relevant control modules was assessed as part of the process.
One fault code was identified:
- B105413, GPS Antenna, open circuit, with an active/static status.
What Is the B105413 Fault Code?
The B105413 code is set when the telematics control module in the vehicle detects an open circuit affecting the GPS antenna. This antenna feeds location data to Audi’s emergency call system, enabling the vehicle’s position to be pinpointed if an automatic emergency call is initiated.
If the system doesn’t receive a valid GPS signal, the SOS function may only operate partially, with a warning message displayed on the dashboard.
This confirmed for our team that the vehicle’s telematics control module had found an open circuit in the GPS antenna signal path.
However, a fault code alone only identifies the area of concern, not the underlying cause.
A B105413 GPS antenna fault like this could stem from the antenna itself, a poor connection, water ingress, or the coaxial cabling. Getting to the true cause of the Audi SOS fault and resolving it properly meant the investigation had to go further.
Tracing the Cause of the B105413 GPS Antenna Fault
Once the B105413 GPS antenna fault was confirmed, the priority moved to determining exactly what had caused it.
While a fault code narrows down the problem area, identifying the true cause demands careful, systematic testing.
Our expert Audi technicians began by reviewing the manufacturer’s technical information service.
As your local independent Audi specialist, our team has access to the same level of technology and technical data as the main Audi dealerships. This covers wiring diagrams, current flow diagrams, component specifications, and any technical service bulletins relevant to the Audi SOS system B105413 fault.
Using this research, our Audi specialists compiled a structured test plan:
- Carry out continuity and correct signal path testing on the coaxial cable and wiring from the GPS antenna to the emergency call module.
- Inspect all connections in the circuit for evidence of poor contact or corrosion.
- Remove the roof antenna module and check it for any signs of water intrusion or physical damage.
Testing began with continuity and resistance checks on the wiring between the emergency call module and the roof-mounted GPS antenna. Every measurement fell within specification, confirming that the cabling and connectors were not the source of the fault.
From there, our Audi specialists turned their focus to the vehicle’s roof antenna module. Once the shark fin antenna was removed and inspected thoroughly, they found that the GPS antenna element housed inside the module had failed, which accounted for the open circuit recorded under the B105413 fault code.
This failure inside the component itself explained the emergency call system warning.
The GPS antenna element had lost the ability to deliver a valid GPS signal to the telematics module, meaning the SOS function was only partially available.
How Did RS Autotechnik Complete the Audi B105413 Fault Fix?
Once the root cause of the Audi SOS system B105413 fault was clear, our Audi specialists contacted Mr P to talk him through the findings. We explained that the GPS antenna housed in the roof-mounted shark fin module had failed internally, which triggered the warning.
At RS Autotechnik, Dursley, no work goes ahead until you have a complete understanding of the fault and have given your go-ahead. Mr P was satisfied with the explanation and authorised our team to move forward with the repair.
Our Audi technicians then proceeded with the Audi B105413 fault fix:
- The faulty roof antenna module was removed with care, and the mounting area was examined for any signs of water damage or deterioration that might compromise the new component.
- A replacement roof antenna module was fitted, restoring the GPS antenna circuit used by the emergency call system.
- Every electrical connection was verified to ensure it was secure and properly seated.
Once the new module was securely in place, the Audi emergency call system repair was ready for verification.
Confirming the Audi A1 Emergency Call System Was Fully Restored
With the new module fitted, our Audi specialists carried out a detailed series of checks to ensure the Audi SOS fault fix had been performed correctly and that the emergency call system was functioning as intended by the manufacturer.
Our team ran through the following confirmation steps:
- Ran a full system scan to verify that no further fault codes had been logged.
- Checked that the SOS indicator in the roof console had returned to its normal state.
- Cleared the stored B105413 fault code using manufacturer-level equipment.
- Verified that the emergency call function reported normal operation with no active warnings.
Every check returned the expected result. The GPS antenna circuit tested correctly, the emergency call system was fully operational once more, and no additional faults were present.
Through a careful, structured approach, our team pinpointed the precise cause of the Audi SOS system B105413 fault without unnecessarily replacing any parts.
The entire fault was diagnosed, tested, and put right during a single visit.
Once our expert Audi technicians had verified that the repair to the Audi emergency call system was successful, they got in touch with Mr P to let him know that his Audi A1 was ready for collection.
Mr P was impressed by the quality of the work, the honest and transparent communication throughout, and the efficient turnaround, all at a better value than a main dealer.
Emergency Call Fault on Your Audi? Speak to the Specialists at RS Autotechnik
Has your Audi flagged an emergency call system warning, or is the SOS light showing red in the roof console?
Having the issue looked into sooner rather than later gives you the best chance of knowing your vehicle’s safety systems are fully operational when it matters most.
Emergency call faults can stem from several causes, including antenna failures, wiring problems, and module faults. Without structured testing and the correct equipment, there’s a real risk of misdiagnosis or unnecessary part replacement.
At RS Autotechnik, Dursley, our Audi specialists use manufacturer-level tools, official technical data, and hands-on experience to investigate faults such as the Audi SOS system B105413 fault and resolve them accurately the first time.
Here is why Audi drivers across Dursley, Bristol and Gloucester trust our team:
- Audi specialists with access to manufacturer-level technology and official technical data.
- 12 months parts and labour guarantee on all completed work.
- A courtesy car is available to keep you on the road while your Audi is with us.
Join the {{review-count}} local customers who have rated us {{average-rating}} stars on Google for accurate repairs, expert knowledge, and better-than-dealer value.
If your Audi has an SOS warning or you suspect an emergency call system fault, call RS Autotechnik, Dursley, today on 01453 796345 to book your inspection.
