Audi SOS System B105413
“Emergency call function fault. Function partially available. Please contact workshop.”
That was the message waiting for Mr H on the dashboard of his Audi A1, and it raised an immediate red flag.
The SOS light in the roof console had turned red, confirming that a built-in safety system was no longer functioning correctly.
Whatever car you drive, an emergency call fault isn’t something to put to one side.
This is the system designed to automatically place an emergency call in the event of a serious collision. The moment it stops working, a layer of protection you’ve probably never questioned is no longer available.
Wanting it sorted without delay, Mr H brought his Audi A1 to JDK Automotive, Camberley, for a thorough assessment.
Read on to discover how our Audi experts investigated the warning, identified the root cause, and carried out the Audi SOS fault fix.
Investigating the Audi SOS System B105413 Fault at JDK Automotive
Once Mr H arrived at JDK Automotive, Camberley, our Audi experts began by listening to what he’d experienced.
Getting a clear picture of the customer’s account is a fundamental part of every investigation at our garage, helping us focus testing where it’s most likely to matter. Mr H explained that an emergency call warning had appeared on his dashboard and that the SOS light on the roof console had turned red.
There were no other faults present, no recent work carried out, and no obvious reason for the warning.
With that background established, our Audi technicians started the opening checks.
Our initial checks involved:
- A thorough visual inspection for any clear signs of damage.
- A system scan to identify any stored or current fault codes.
Our Audi experts didn’t find anything unusual during the visual inspection. Every component was intact and in its correct position, with no damage visible. With that part of the process finished, 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 alongside the results.
A single fault code came back:
- B105413, GPS Antenna, open circuit, with an active/static status.
What Is the B105413 Fault Code?
This code is triggered when the telematics control module in the vehicle registers an open circuit affecting the GPS antenna. It’s the GPS antenna that feeds location data to Audi’s emergency call system, enabling the vehicle’s position to be identified should an automatic emergency call be placed.
If a valid GPS signal isn’t received by the system, the SOS function may operate only partially, and a warning will appear on the dashboard.
This confirmed that the vehicle’s telematics control module had detected an open circuit in the GPS antenna signal path.
However, a fault code on its own only identifies where the fault lies, not what caused it.
A B105413 GPS antenna fault of this type could be down to the coaxial cabling, the antenna itself, water ingress, or a poor connection. Uncovering the actual cause of the Audi SOS fault and getting it fixed properly meant the investigation had to continue.
Why Did the B105413 GPS Antenna Fault Occur?
Once the B105413 GPS antenna fault had been confirmed, the next step was to determine exactly what was causing it.
While a fault code points to the area of concern, reaching the underlying cause requires focused investigation and systematic testing.
Our expert Audi technicians began by reviewing the manufacturer’s technical information service.
As your local independent Audi expert, 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 connected to the Audi SOS system B105413 fault.
Based on this research, our Audi experts put together 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.
- Remove the roof antenna module and check it for any signs of water intrusion or physical damage.
- Inspect all connections along the circuit for evidence of poor contact or corrosion.
Testing started with continuity and resistance checks on the wiring between the emergency call module and the roof-mounted GPS antenna.
The results were within specification, which ruled out a cable or connector fault.
The investigation then moved to the roof antenna module itself. When our Audi experts removed the shark fin antenna and examined it closely, they confirmed that the GPS antenna element within the module had failed, resulting in the open circuit indicated by the B105413 fault code.
It was this internal failure that triggered the emergency call system warning. With the GPS antenna element no longer able to provide a valid GPS signal to the telematics module, the SOS function had been operating only partially.
Completing the Audi B105413 Fault Fix: How the Repair Was Done
With the root cause of the Audi SOS system B105413 fault now confirmed, our Audi experts got in touch with Mr H to go through the findings. We explained that the GPS antenna inside the roof-mounted shark fin module had failed internally, which triggered the warning.
At JDK Automotive, Camberley, no work goes ahead until you fully understand the fault and give your go-ahead.
Mr H was satisfied with our team’s findings and authorised us to proceed with the repair of the Audi emergency call system.
Our expert 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 in place, the Audi emergency call system repair was ready for its final checks.
Was the Audi SOS Fault Fix Successful? Confirming the Results
With the replacement fitted, our Audi experts ran a thorough series of checks to ensure the Audi SOS fault fix had been carried out correctly and that the emergency call system was functioning as intended by the manufacturer.
Our team completed the following confirmation steps:
- Ran a full system scan to verify that no further fault codes had been logged.
- Verified that the emergency call function reported normal operation with no active warnings.
- Cleared the stored B105413 fault code using manufacturer-level equipment.
- Confirmed that the SOS indicator in the roof console had returned to its normal state.
Every repair validation check came back as expected. The GPS antenna circuit tested correctly, the emergency call system was fully operational again, and no additional faults were present.
Through a methodical, structured approach, our team identified 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 H to let him know that his Audi A1 was ready for collection.
Mr H was pleased with the quality of the repair, the straightforward communication throughout, and the efficient turnaround, all at a better value than a main dealer.
Red SOS Light on Your Audi? Speak to the Audi Experts at JDK Automotive
Has your Audi flagged an emergency call system warning, or is the SOS light showing red in the roof console?
Getting the fault assessed early gives you the best chance of knowing your vehicle’s safety systems are fully operational when it matters most.
Emergency call faults can have several causes, including antenna failures, wiring problems, and module faults. Without structured testing and the right equipment, it’s easy to misdiagnose the issue or replace parts that didn’t need replacing.
At JDK Automotive, Camberley, our Audi experts use manufacturer-level tools, official technical data, and hands-on experience to investigate faults like the Audi SOS system B105413 fault and resolve them accurately the first time.
Here is why Audi drivers across Camberley, Farnborough and the nearby areas trust our team:
- 12 months parts and labour guarantee on all completed work.
- Better value compared to main dealer pricing, without compromising on workmanship or parts.
- Audi experts with access to manufacturer-level technology and official technical data for accurate fault finding.
Join the {{review-count}} local customers who have rated us {{average-rating}} stars on Google for accurate repairs, expert knowledge and excellent value.
If your Audi has an SOS warning or you suspect a fault with the emergency call system, call JDK Automotive in Camberley today on 01276 535585 to book your inspection.
