Audi SOS System B105413
“Emergency call function fault. Function partially available. Please contact workshop.”
When Mr R saw this message flash up on his Audi A1’s dashboard, he knew something needed attention.
The SOS button in the roof lining had turned red, signalling that a key safety system in his vehicle was no longer functioning correctly.
Whatever vehicle you drive, an emergency call system warning deserves immediate attention.
This is the system designed to automatically place an emergency call after a serious collision. When it’s no longer working, a safety feature you’ve probably never thought twice about is suddenly unavailable.
Not willing to leave it unresolved, Mr R brought his Audi A1 to Smith’s of London, Croydon, for a thorough investigation.
Below, you’ll learn how our Audi specialists got to the bottom of the fault, what testing revealed, and how the Audi SOS system was restored to full working order.
How Our Team First Investigated the B105413 SOS Fault
Once Mr R arrived at Smith’s of London, Croydon, our Audi specialists began by listening to what he had to say.
Every investigation at our garage starts with the customer’s experience, because understanding exactly what’s happened gives our team the best chance of directing the process accurately from the very beginning.
Mr R explained that a fault message had appeared on the dashboard and that the SOS indicator on the roof console had turned red.
His vehicle hadn’t shown any other faults, no work had been done recently, and there was no obvious reason for the warning.
With that information in hand, our Audi technicians started the initial checks.
Our opening checks included:
- A thorough visual inspection to look for any visible signs of damage.
- A system scan to check for any stored or current fault codes.
Nothing unusual was found during the visual inspection. All components were visually intact with no damage present. With the visual review complete, our specialists moved their focus to the system scan.
The system scan was run using Audi manufacturer-level technology, while live data from the relevant control modules was reviewed in parallel.
The scan highlighted one fault code:
- B105413, GPS Antenna, open circuit, with an active/static status.
Why Does the B105413 Fault Code Matter?
This code is logged when the vehicle’s telematics control module detects an open circuit within the GPS antenna circuit.
The antenna is the component that supplies location data to Audi’s emergency call system, allowing the vehicle’s position to be established if an automatic emergency call needs to be placed.
Without a valid GPS signal reaching the system, the SOS function may only be partially operational, meaning a warning message will appear on the dashboard, and the system may not respond as expected in an emergency.
This confirmed that the vehicle’s telematics control module had registered an open circuit in the GPS antenna signal path.
A fault code, though, only points to the affected area. It doesn’t explain why the fault has occurred.
A B105413 GPS antenna fault could result from a connection fault, the antenna itself, the coaxial cabling, or water ingress. Understanding the true cause of the Audi SOS fault and repairing it correctly required the investigation to continue.
How Did Our Team Establish the Cause of the B105413 GPS Antenna Fault?
Now that the B105413 GPS antenna fault had been confirmed, the focus shifted to understanding its root cause.
A fault code points to the problem, but uncovering the actual cause requires detailed testing and structured investigation.
Our Audi specialists began by referring to 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 connected to the Audi SOS system B105413 fault.
Drawing on this research, our expert Audi technicians developed a clear 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 across the circuit for evidence of poor contact or corrosion.
- Remove the roof antenna module and assess it for any signs of water intrusion or physical damage.
Continuity and resistance testing on the wiring between the emergency call module and the roof-mounted GPS antenna was completed first. All results fell within specification, effectively ruling out a fault in the cabling or connectors.
Attention then moved to the roof antenna module. Once our Audi specialists removed the shark fin antenna and inspected it in detail, they established that the GPS antenna element within the module had failed, resulting in the open circuit flagged by the B105413 fault code.
This failure within the component was the direct cause of the emergency call system warning. Because the GPS antenna element could no longer provide a valid GPS signal to the telematics module, the SOS function had been reported as only partially available.
Carrying Out the Audi B105413 Fault Fix at Smith’s of London
Once the root cause had been established, our Audi technicians contacted Mr R to review the findings in detail. We explained that the GPS antenna within the roof-mounted shark fin module had failed internally, and that this was directly responsible for the Audi SOS system B105413 warning.
At Smith’s of London, Croydon, no work starts until you have a clear understanding of the problem and have given your approval.
Mr R was pleased with the clarity of the explanation and gave our Audi specialists the go-ahead to carry out the repair.
Our team then began the Audi B105413 fault fix:
- The faulty roof antenna module was removed carefully, and the mounting area was assessed for any signs of water damage or deterioration that could affect the replacement component.
- A replacement roof antenna module was installed, restoring the GPS antenna circuit used by the emergency call system.
- All electrical connections were inspected to confirm they were secure and properly seated.
With the replacement module installed, the Audi emergency call system repair was ready for final confirmation.
Final Verification: Confirming the Audi SOS Fault Fix Was Complete
With the replacement complete, our Audi specialists conducted a series of checks to confirm the Audi SOS fault fix was successful and that the emergency call system was functioning as intended by the manufacturer.
Our team performed the following verification steps:
- 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.
- Ran a full system scan to ensure that no additional fault codes had been stored.
All checks confirmed the expected results. The GPS antenna circuit tested correctly, the emergency call system had been fully restored, and no further faults were present.
Taking a methodical, evidence-led approach, our team identified the exact cause of the Audi SOS system B105413 fault without replacing any parts that didn’t need to be replaced.
The fault was investigated, tested, and resolved during a single visit.
Once our expert Audi technicians confirmed that the repair to the Audi emergency call system was successful, they contacted Mr R to let him know that his Audi A1 was ready for collection.
Mr R was pleased with the precision of the repair, the straightforward communication he’d received throughout, and the efficient turnaround, all at a better value compared to a main dealer.
Audi SOS System Fault? Trust Smith’s of London to Find the Cause
Is your Audi showing an SOS warning light or an emergency call fault message?
Acting quickly gives you the best chance of confirming that your vehicle’s safety systems are fully operational.
Emergency call faults can arise from a variety of causes, including antenna failures, wiring issues, and module faults. Without structured testing using the correct equipment, there’s a genuine risk of the fault being misdiagnosed or parts being replaced unnecessarily.
At Smith’s of London, Croydon, 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 fix them accurately the first time.
Here is why Audi drivers across Croydon, Beckenham, Coulsdon and the local area trust our experts:
- Audi specialists with access to manufacturer-level technology and official technical data.
- 12 months parts and labour guarantee on all completed work.
- Better value compared to main dealer pricing, without compromising on quality.
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If your Audi has an SOS warning or you suspect a fault with the emergency call system, call Smith’s of London, Croydon, today on 020 8674 3377 to book your inspection.
