Audi SOS System B105413
“Emergency call function fault. Function partially available. Please contact workshop.”
That was the message staring back at Mrs Q from the dashboard of her Audi A1, and it was impossible to ignore.
The red SOS indicator on the roof console had lit up, indicating that one of the vehicle’s critical safety systems had partially shut down.
An emergency call fault isn’t the kind of warning you sit on and hope will go away.
It’s the system designed to automatically place an emergency call in the event of a serious collision. Once it stops functioning, a layer of protection you’ve likely taken for granted is suddenly gone.
Determined to get it sorted, Mrs Q brought her Audi A1 to SB Autocare, Wellingborough, looking for expert guidance.
Read on to discover how our Audi experts investigated the warning, identified the root cause, and put the Audi SOS system right.
The First Steps in Assessing the Audi SOS System B105413 Fault
When Mrs Q arrived at SB Autocare, Wellingborough, our Audi experts began by listening to what she’d noticed.
At our garage, hearing the customer’s own description of the problem is an essential starting point for every investigation, ensuring our team is looking in the right places from the outset. Mrs Q described how an emergency call warning had appeared on her dashboard, along with a red SOS indicator in the roof console.
There had been no previous issues with the car, no recent work, and nothing that might have caused the fault to appear.
With her account noted, our Audi technicians set about the first stage of checks.
These opening checks involved:
- A detailed visual inspection for any apparent signs of damage.
- A system scan to identify any stored or active fault codes.
Our Audi experts found nothing of concern during the visual inspection. All components were undamaged and in their correct positions. After the visual assessment, our team progressed 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.
A single fault code was present:
- B105413, GPS Antenna, open circuit, with an active/static status.
What Does a B105413 Fault Code Indicate?
A B105413 fault code indicates that the telematics control module has registered an open circuit in the GPS antenna circuit. It’s this antenna that delivers the location data Audi’s emergency call system relies on to work out the vehicle’s position when an automatic emergency call is made.
Should a valid GPS signal fail to reach the system, the SOS function may be restricted to partial availability, and a dashboard warning message will be triggered.
This made it clear that the vehicle’s telematics control module had identified an open circuit in the GPS antenna signal path.
A fault code by itself, however, only highlights the affected area, not what caused it.
A B105413 GPS antenna fault of this kind could be down to water ingress, the coaxial cabling, a connection problem, or the antenna itself. Pinpointing the actual cause of the Audi SOS fault and putting it right called for deeper investigation.
What Was Behind the B105413 GPS Antenna Fault?
With the B105413 GPS antenna fault now established, the next task was to find out precisely what had caused it.
A fault code flags the problem area, but understanding why it occurred requires methodical investigation and focused testing.
Our Audi technicians started by accessing the manufacturer’s technical information service.
As your local independent Audi expert, 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 associated with the Audi SOS system B105413 fault.
Based on this research, our Audi experts assembled a targeted test plan:
- Remove the roof antenna module and examine it for any indication of water intrusion or physical damage.
- Inspect every connection within the circuit for signs of poor contact or corrosion.
- Carry out continuity and correct signal path testing on the coaxial cable and wiring between the GPS antenna and the emergency call module.
Continuity and resistance testing of the wiring from the emergency call module to the roof-mounted GPS antenna was performed first. All readings fell within specification, confirming that the cabling and connectors were not responsible.
With that ruled out, our Audi experts moved on to the roof antenna module.
After removing the shark fin antenna and carrying out a close inspection, they confirmed that the GPS antenna element housed within the module had failed, which was the direct cause of the open circuit indicated by the B105413 fault code.
This internal component failure explained the emergency call system warning. The GPS antenna element had lost the ability to supply a valid GPS signal to the telematics module, leaving the SOS function only partially available.
How Was the Audi B105413 Fault Fix Completed?
Having confirmed the root cause, our Audi experts contacted Mrs Q to walk her through what had been discovered. 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 SB Autocare, Wellingborough, no repair work begins until you fully understand the fault and give your approval to proceed. Mrs Q was confident in the findings and gave our team the green light for 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 checked 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 inspected 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 SOS System Fully Restored?
Once the replacement module was in place, our Audi experts performed a thorough series of checks to ensure the Audi SOS fault fix had been completed correctly and that the emergency call system was working as intended by the manufacturer.
Our team carried out the following steps:
- Verified that the emergency call function reported normal operation with no active warnings.
- Ran a complete system scan to confirm that no further fault codes had been recorded.
- 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.
Each check produced the expected outcome. The GPS antenna circuit tested correctly, full emergency call system function was confirmed, and no other faults were identified.
Using a methodical, structured approach, our team established the exact cause of the Audi SOS system B105413 fault without any unnecessary part replacements.
The fault was fully investigated, tested, and resolved within a single visit.
Once our Audi experts had confirmed that the repair to the Audi emergency call system was complete, they called Mrs Q to let her know that her Audi A1 was ready for collection.
Mrs Q was delighted with the standard of work, the clear communication at every stage, and the efficient turnaround, all at a better value compared to a main dealer.
Red SOS Light on Your Audi? Let the Experts at SB Autocare Investigate
Is your Audi displaying a red SOS indicator or an emergency call fault warning?
The sooner the fault is investigated, the sooner you can be confident 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 the right technology and a methodical approach to testing, it’s all too easy for the fault to be misidentified or for parts to be swapped out that weren’t the problem.
At SB Autocare, Wellingborough, 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 put them right the first time.
Here is why Audi drivers across Wellingborough and Northampton trust our team:
- Audi experts with access to manufacturer-level technology and official technical data.
- 12 months parts and labour guarantee on all completed work.
- A courtesy car is available, so you’re not left without transport while your vehicle 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 SB Autocare, Wellingborough, today on 01933 229630 to book your inspection.
