Audi SOS System B105413
“Emergency call function fault. Function partially available. Please contact workshop.”
For Mr V, finding this message on the dashboard of his Audi A1 raised immediate concern.
The red SOS indicator in the roof lining had come on, telling him that one of the vehicle’s key safety features was no longer fully active.
No matter what you drive, an emergency call system warning demands prompt attention.
It’s a system designed to automatically place an emergency call in the event of a serious collision. When it stops working, a layer of safety you’ve likely taken for granted is suddenly no longer in place.
Looking for expert help, Mr V brought his Audi A1 to Ystrad Service Centre, Ystrad Mynach, to have the fault properly investigated.
Read on to learn how our Audi specialists got to the root of the issue, what testing revealed, and how the Audi SOS system was put right.
How Our Audi Specialists First Assessed the B105413 SOS Warning
When Mr V arrived at Ystrad Service Centre, Ystrad Mynach, our Audi specialists began by listening to his account of the problem. At our garage, hearing what the customer has experienced is where every investigation begins, ensuring the process is pointed in the right direction before any tools are picked up. Mr V described how a fault message had appeared on his dashboard, along with a red SOS indicator in the roof console.
There had been no previous issues with the car, no work had recently been carried out, and nothing obvious that could have caused the fault.
With his account noted, our Audi technicians set about the initial checks.
These opening checks involved:
- A detailed visual inspection to identify any apparent signs of damage.
- A system scan to check for any stored or active fault codes.
Our Audi specialists found nothing out of the ordinary during the visual inspection. All components appeared undamaged and in their correct positions. After the visual assessment, our team moved on to the system scan.
The system scan was completed using Audi manufacturer-level technology, with live data from the relevant control modules examined at the same time.
One fault code was present:
- B105413, GPS Antenna, open circuit, with an active/static status.
What Does a B105413 Fault Code Indicate?
A B105413 code is set when the telematics control module detects that an open circuit exists within the GPS antenna circuit. The GPS antenna is the component that delivers location data to Audi’s emergency call system, allowing the vehicle’s position to be identified if an automatic emergency call takes place.
Should a valid GPS signal fail to reach the system, the SOS function may be restricted to partial operation, with a warning message shown on the dashboard.
This made it clear that the vehicle’s telematics control module had identified an open circuit in the GPS antenna signal path.
On its own, though, a fault code only highlights where the problem sits, not what caused it.
A B105413 GPS antenna fault of this kind could stem from water ingress, the antenna itself, a connection problem, or the coaxial cabling. Pinpointing the actual cause of the Audi SOS fault and putting it right called for deeper investigation.
How Was the Root Cause of the B105413 GPS Antenna Fault Found?
With the B105413 GPS antenna fault established, our team needed to determine the exact cause.
A fault code tells you where the problem lies, but identifying the actual cause requires structured testing and detailed analysis.
Our Audi specialists began by accessing the manufacturer’s technical information service.
As your local independent Audi specialist, our team has access to the same technology and technical data as the main dealerships. This includes 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 technicians compiled a focused test plan:
- Carry out continuity and correct signal path testing on the coaxial cable and wiring between the GPS antenna and the emergency call module.
- Inspect all connections across the circuit for evidence of poor contact or corrosion.
- Remove the roof antenna module and inspect it for any signs of water intrusion or physical damage.
Continuity and resistance testing on the wiring from the emergency call module to the roof-mounted GPS antenna was performed first. All measurements were within specification, effectively eliminating a fault in the cabling or connectors.
From there, our Audi experts focused on the roof antenna module. Once the shark fin antenna was removed and thoroughly inspected, they found that the GPS antenna element inside the module had failed, resulting in the open circuit indicated by the B105413 fault code.
This failure inside the component itself explained the emergency call system warning. Because the GPS antenna element had lost the ability to provide a valid GPS signal to the telematics module, the SOS function was only partially available.
How Did Ystrad Service Centre Complete the Audi B105413 Fault Fix?
Having confirmed the root cause, our Audi specialists contacted Mr V to walk him through the findings in full. We outlined how the GPS antenna inside the roof-mounted shark fin module had failed internally, and why this had caused the Audi SOS system B105413 warning to appear.
At Ystrad Service Centre, Ystrad Mynach, no repair begins until you fully understand the fault and give your approval to proceed. Mr V was confident in the findings and gave our team the green light to carry out the repair.
Our expert Audi technicians then began the Audi B105413 fault fix:
- The failed roof antenna module was carefully removed, and the mounting area was assessed for any signs of water damage or deterioration that could affect the replacement.
- A new roof antenna module was fitted, restoring the GPS antenna circuit used by the emergency call system.
- Each electrical connection was checked to make sure it was secure and seated correctly.
With the replacement module fitted and connected, the Audi emergency call system repair was ready for final confirmation.
Was the Audi SOS Fault Fix Successful? Final Confirmation
Once the replacement module was fitted, our Audi technicians 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 working as intended by the manufacturer.
Our Audi specialists performed the following steps:
- Cleared the stored B105413 fault code using manufacturer-level equipment.
- Ran a complete system scan to confirm that no further fault codes had been recorded.
- Verified that the emergency call function reported normal operation with no active warnings.
- Checked that the SOS indicator in the roof console had returned to its normal state.
Each check confirmed that the repair was successful.
The GPS antenna circuit tested correctly, the full emergency call system function was confirmed, and no other faults were identified.
By taking a methodical, evidence-led approach, our team pinpointed the exact cause of the Audi SOS system B105413 fault without any unnecessary part replacements.
The fault was fully investigated, tested, and resolved in a single visit.
Once our Audi experts had confirmed that the repair to the Audi emergency call system was complete, they called Mr V to let him know that his Audi A1 was ready for collection.
Mr V was pleased with the standard of the work, the clear communication at every stage, and the efficient turnaround, all at a better value compared to a main dealer.
Emergency Call System Warning on Your Audi? Speak to the Specialists at Ystrad Service Centre
Is your Audi showing an SOS warning or a red indicator in the roof console?
The sooner the fault is investigated, the sooner you’ll have confidence that your vehicle’s safety systems are ready when you need them.
Emergency call faults can originate from a variety of causes, whether that’s an antenna failure, a wiring fault, or a module issue. Without the right equipment and a structured testing approach, there’s a genuine risk of misdiagnosis or unnecessary part replacement.
At Ystrad Service Centre, Ystrad Mynach, our Audi specialists use manufacturer-level tools, official technical data, and hands-on experience to investigate faults like the Audi SOS system B105413 fault and put them right the first time.
Here is why Audi drivers across Ystrad Mynach, Caerphilly and Cardiff trust our specialists:
- Audi specialists with access to manufacturer-level technology and official technical data.
- 12 months parts and labour guarantee on all completed work.
- A courtesy vehicle is available to keep you mobile while your Audi is being repaired.
Join the {{review-count}} customers who have rated us {{average-rating}} stars on Google for accurate repairs, expert knowledge and great value.
If your Audi has an SOS warning or you suspect an emergency call system fault, call Ystrad Service Centre, Ystrad Mynach, today on 01443 540460 to book your inspection.
