Audi SOS System B105413
“Emergency call function fault. Function partially available. Please contact workshop.”
When Mrs G saw this warning appear on her Audi A1’s dashboard, she knew it wasn’t something she could ignore.
The SOS indicator on the roof console had turned red, a clear sign that one of the vehicle’s key safety systems had stopped functioning properly.
An emergency call system warning demands attention, no matter what you drive.
It’s the system designed to automatically place an emergency call in the event of a serious collision. When it fails, you lose a layer of protection you may not have given a second thought to until it’s gone.
Not prepared to leave it any longer, Mrs G brought her Audi A1 to Garden City Garage, Seven Sisters, looking for answers.
Throughout this blog, you’ll reveal how our Audi specialists pinpointed the fault, what our investigation revealed, and how the Audi SOS system was fully restored.
How Our Audi Specialists Assessed the B105413 SOS System Fault
When Mrs G arrived at Garden City Garage, Seven Sisters, our Audi specialists began by listening to her account of the problem.
At our garage, taking the time to understand what a customer has experienced is where every investigation starts, ensuring the process is pointed in the right direction before anything else happens.
Mrs G told us that a warning message had appeared on the dashboard and that the SOS indicator in the roof console had gone red.
There had been no other concerns with the vehicle, no recent work done, and nothing that could explain why the warning had appeared.
With that understanding in place, our Audi technicians moved on to the initial checks.
Our first checks included:
- A full visual inspection to look for any obvious signs of damage.
- A system scan to retrieve any stored or active fault codes.
The visual inspection turned up nothing unusual. All components appeared to be in good condition, with no visible damage or disturbance. Once the visual check was complete, our specialists progressed to the system scan.
The system scan was completed using Audi manufacturer-level technology, with live data from the relevant control modules reviewed at the same time.
The scan revealed one fault code:
- B105413, GPS Antenna, open circuit, with an active/static status.
What Does the B105413 Fault Code Mean?
When this code is stored, it means the vehicle’s telematics control module has detected an open circuit in the GPS antenna circuit. The GPS 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 is triggered.
Without a valid GPS signal, the SOS function may be partially available, and a warning message will be displayed on the dashboard.
This told our team that the vehicle’s telematics control module had registered an open circuit in the GPS antenna signal path.
A fault code by itself, though, doesn’t explain what’s gone wrong.
A B105413 GPS antenna fault like this could originate from the antenna, the coaxial cabling, a connector fault, or water ingress. To find the true cause of the Audi SOS fault and repair it correctly, the investigation needed to go further.
Investigating the Root Cause of the B105413 GPS Antenna Fault
With the B105413 GPS antenna fault now confirmed, our next priority was finding out what had caused it.
A fault code identifies the affected area, but establishing the root cause calls for structured testing and detailed investigation.
Our Audi technicians started by consulting 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.
From this research, our Audi specialists drew up a targeted 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 within the circuit for signs of poor contact or corrosion.
- Remove the roof antenna module and examine it for evidence of water intrusion or physical damage.
The opening stage of testing focused on continuity and resistance testing of the wiring running from the emergency call module to the roof-mounted GPS antenna. All readings came back within specification, which eliminated a cable or connector fault from the investigation.
Our Audi specialists then turned their focus to the roof antenna module.
After removing the shark fin antenna and inspecting it in detail, they discovered that the GPS antenna element inside the module had failed, producing the open circuit recorded by the B105413 fault code.
This internal component failure was why the emergency call system had flagged the warning. The GPS antenna element could no longer deliver a valid GPS signal to the telematics module, which explained why the SOS function had been left only partially available.
How Was the Audi SOS System B105413 Fault Repaired?
Once the root cause had been established, our Audi technicians contacted Mrs G to explain what the investigation had uncovered. We talked her through how the GPS antenna within the roof-mounted shark fin module had failed internally, and why this had triggered the Audi SOS system B105413 warning.
At Garden City Garage, Seven Sisters, no repair work is carried out until you have a clear understanding of the issue and have given your approval. Mrs G was happy with the explanation and gave our Audi specialists the go-ahead to proceed.
Our team then carried out the Audi B105413 fault fix:
- The failed roof antenna module was removed carefully, and the mounting area was checked for any signs of water damage or deterioration that could affect the replacement component.
- A new 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 correctly seated.
With the replacement module fitted, the Audi emergency call system repair was ready for verification.
Verifying That the Audi A1’s Emergency Call System Was Restored
Once the replacement was complete, our Audi technicians performed a series of checks to ensure the Audi SOS fault fix had been successful and that the emergency call system was operating as intended by the manufacturer.
Our team carried out the following verification steps:
- Cleared the stored B105413 fault code using manufacturer-level equipment.
- Checked that the SOS indicator in the roof console had returned to its normal state.
- Ran a full system scan to confirm that no additional fault codes had been stored.
- Verified that the emergency call function reported normal operation with no active warnings.
All checks produced the expected results. The GPS antenna circuit tested correctly, the emergency call system was fully restored, and no further faults were found.
By following a structured, methodical approach, our team traced the exact cause of the Audi SOS system B105413 fault without unnecessarily replacing parts.
The fault was investigated, tested, and resolved in a single visit.
Once our Audi specialists had confirmed the Audi emergency call system repair was complete, they contacted Mrs G to let her know that her Audi A1 was ready for collection.
Mrs G was pleased with the outcome, the clear communication she’d received throughout, and the efficient turnaround, all at a better value compared to a main dealer.
Audi SOS System Warning? Let Garden City Garage Investigate
Is your Audi displaying a red SOS light or an emergency call fault message?
Having the fault looked into sooner rather than later is the best way to confirm that your vehicle’s safety systems are working when you need them.
Emergency call faults can arise from a range of causes, including antenna failures, wiring faults, and module issues. Without the right equipment and a structured approach to testing, there’s a real risk of misdiagnosing the fault or replacing parts unnecessarily.
At Garden City Garage, Seven Sisters, our Audi specialists use manufacturer-level technology, official technical data, and hands-on experience to investigate faults such as the Audi SOS system B105413 and repair them correctly the first time.
Here is why Audi drivers across Seven Sisters, Neath and South Wales 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.
- Better value compared to main dealer pricing, with no compromise on quality.
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 a fault with the emergency call system, call Garden City Garage, Seven Sisters, today on 01639 701604 to book your inspection.
