Audi SOS System B105413
“Emergency call function fault. Function partially available. Please contact workshop.”
Mrs M wasn’t expecting to see this warning flash up on her Audi A1’s dashboard, and it immediately raised concern.
The red SOS indicator on the roof console had lit up, indicating that one of the vehicle’s key safety features was no longer fully operational.
No matter what vehicle you drive, an emergency call system warning is something that demands prompt attention.
It’s the system designed to automatically place an emergency call in the event of a serious collision. Once it goes down, a safety net you may never have given a second thought to is suddenly unavailable.
Determined to get answers, Mrs M brought her Audi A1 to Quality Car Service, Milton Keynes, looking for a clear diagnosis.
Read on to learn how our Audi specialists identified the fault, what the investigation revealed, and how the Audi SOS fault fix was carried out.
Our Audi Specialists’ Assessment of the B105413 SOS System Warning
When Mrs M arrived at Quality Car Service, Milton Keynes, our Audi specialists began by listening.
At our garage, hearing exactly what the customer has experienced is the starting point of every investigation, allowing our team to focus the process effectively from the outset. Mrs M described how a warning had appeared on her dashboard, along with a red SOS indicator in the roof console.
There had been no previous concerns with the car, no recent work done, and nothing obvious that might have triggered the fault.
With her account gathered, our Audi technicians set about the opening checks.
These first checks involved:
- A detailed visual inspection to spot any clear signs of damage.
- A system scan to capture any stored or current fault codes.
Nothing unusual was identified during the visual inspection. All components appeared undamaged and in their correct positions. With the visual assessment finished, our specialists turned their attention to the system scan.
The system scan was completed using Audi manufacturer-level technology, with live data from the relevant control modules used to assess the process.
One fault code was present:
- B105413, GPS Antenna, open circuit, with an active/static status.
What Does the B105413 Fault Code Mean?
When this Audi fault code appears, it means your vehicle’s telematics control module has found an open circuit affecting the GPS antenna circuit. It’s this antenna that supplies the location data Audi’s emergency call system needs to pinpoint the vehicle’s position if an automatic emergency call is made.
Should a valid GPS signal fail to reach the system, the SOS function may only operate partially, and a warning message will be displayed 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.
But a fault code by itself doesn’t reveal why the fault has occurred.
A B105413 GPS antenna fault of this nature could result from the coaxial cabling, water ingress, the antenna itself, or a connection problem. Establishing the true cause of the Audi SOS fault and putting it right demanded further investigation.
How Did the B105413 GPS Antenna Fault Happen?
With the B105413 GPS antenna fault now established, our team needed to determine precisely what had caused it.
While a fault code identifies where the problem lies, identifying the root cause requires detailed investigation and targeted testing.
Our Audi technicians 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 dealers. This includes wiring diagrams, current flow diagrams, component specifications, and any technical service bulletins relevant to the Audi SOS system B105413 fault.
Using this information, our Audi specialists developed a focused test plan:
- Carry out continuity and correct signal path testing on the coaxial cable and wiring running from the GPS antenna to the emergency call module.
- Inspect every connection in the circuit for signs of poor contact or corrosion.
- Remove the roof antenna module and check it for any evidence 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 carried out first. All measurements were within specification, effectively ruling out a fault in the cabling or connectors.
From there, our Audi experts turned their attention to the roof antenna module. Once the shark fin antenna was removed and thoroughly inspected, they found that the GPS antenna element within the module had failed, resulting in the open circuit indicated by the B105413 fault code.
This failure within the component itself triggered 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.
Completing the Audi B105413 Fault Fix at Quality Car Service
Having confirmed the root cause, our Audi technicians got in touch with Mrs M to walk her through the findings. 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 Quality Car Service, Milton Keynes, no work begins until you have a complete understanding of the issue and have given your go-ahead. Mrs M was confident in the findings and gave our Audi specialists the green light to carry out the repair.
Our expert Audi technicians then completed 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 impact the replacement.
- A new roof antenna module was installed, 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 its final checks.
Was the Audi A1 Emergency Call System Fully Restored?
Once the replacement module was fitted, our Audi technicians ran a thorough 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 carried out the following steps:
- Ran a complete system scan to confirm that no further fault codes had been recorded.
- 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.
Each check produced the expected outcome. 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 Mrs M to let her know that her Audi A1 was ready for collection.
Mrs M was delighted with the quality of the work, the clear communication at every stage, and the efficient turnaround, all at a better value than a main dealer.
Red SOS Light on Your Audi? Speak to the Specialists at Quality Car Service
Is your Audi flagging an SOS warning or showing a red light in the roof console?
The sooner the fault is looked into, the sooner you can be confident that your vehicle’s safety systems are ready when you need them.
Emergency call faults can originate from a range of causes, including antenna failure, wiring faults, or module issues. Without structured testing using the correct equipment, it’s all too easy for the fault to be misidentified or for parts to be swapped out that weren’t the problem.
At Quality Car Service, Milton Keynes, 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 Milton Keynes 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 vehicle is available to keep you mobile while your Audi is being repaired.
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If your Audi has an SOS warning or you suspect an emergency call system fault, call Quality Car Service, Milton Keynes, today on 01908 376555 to book your inspection.
