Audi SOS System B105413 Fault
“Emergency call function fault. Function partially available. Please contact workshop.”
When Mrs K spotted this message on the dashboard of her Audi A1, it stopped her in her tracks.
The SOS indicator in the roof console had turned red, confirming that a critical safety feature built into her vehicle was no longer working as it should.
An emergency call system fault isn’t a warning any driver should overlook.
It’s the system designed to automatically place an emergency call if a serious collision occurs. The moment it stops working, a layer of safety you’ve probably never had to think about is suddenly missing.
Not willing to take any chances, Mrs K brought her Audi A1 to P. Breading Motor Services, Southend-on-Sea, to have the fault properly assessed.
Here, you’ll find out how our Audi specialists investigated the warning, what the root cause turned out to be, and how the Audi SOS fault fix was completed.
How P. Breading Motor Services Assessed the Audi SOS System B105413 Fault
When Mrs K arrived at P. Breading Motor Services, Southend-on-Sea, our Audi specialists began by listening to her description of the problem.
At our garage, understanding the customer’s experience first-hand is a vital starting point for every investigation, helping our team focus the process accurately before any testing begins. Mrs K explained that a warning message had appeared on her dashboard and that the SOS indicator in the roof console had gone red.
There had been no other issues with the vehicle, no recent repairs, and nothing that might explain the warning.
With that picture clear, our Audi technicians began the initial checks.
Our opening checks included:
- A thorough visual inspection for any obvious signs of damage.
- A system scan to retrieve any stored or active fault codes.
The visual inspection didn’t flag anything unusual. All components were intact, with no visible signs of damage or disturbance. After the visual check, our specialists turned their attention to the system scan.
The system scan was carried out using Audi manufacturer-level technology, with live data from the relevant control modules simultaneously assessed.
The scan returned one fault code:
- B105413, GPS Antenna, open circuit, with an active/static status.
Why Does the B105413 Fault Code Matter?
This fault code is stored when the vehicle’s telematics control module identifies an open circuit within the GPS antenna circuit. The GPS antenna supplies location data to Audi’s emergency call system, enabling the vehicle’s position to be determined when an automatic emergency call is needed.
If the system cannot receive a valid GPS signal, the SOS function may only work partially, and a warning message will appear on the dashboard.
This indicated to our team that the vehicle’s telematics control module had detected an open circuit in the GPS antenna signal path.
However, a fault code alone doesn’t reveal the underlying cause.
A B105413 GPS antenna fault like this could result from water ingress, the antenna itself, a connector fault, or the coaxial cabling. Finding the true cause of the Audi SOS fault and repairing it properly meant the investigation needed to continue.
What Was the Root Cause of the B105413 GPS Antenna Fault?
With the B105413 GPS antenna fault confirmed, our next task was to find out exactly what had caused it.
A fault code narrows the area of concern, but identifying the root cause requires structured investigation and focused testing.
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 linked to the Audi SOS system B105413 fault.
From this research, our Audi specialists put together 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 check it for any evidence of water intrusion or physical damage.
The opening round of testing concentrated on continuity and resistance testing of the wiring from the emergency call module to the roof-mounted GPS antenna. All results came back within specification, ruling out a cable or connector fault.
Our Audi experts then turned their attention to the roof antenna module. After removing the shark fin antenna and performing a thorough inspection, they found that the GPS antenna element inside the module had failed, causing the open circuit flagged by the B105413 fault code.
This internal failure was the direct cause of the emergency call system warning.
The GPS antenna element could no longer supply a valid GPS signal to the telematics module, which explained why the SOS function had been recorded as only partially available.
How P. Breading Motor Services Completed the Audi B105413 Fault Fix
With the root cause confirmed, our Audi technicians contacted Mrs K to explain the investigation’s findings. We walked 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 P. Breading Motor Services, Southend-on-Sea, no repair is carried out until you fully understand the fault and have given your approval. Mrs K was happy with the findings and gave our Audi specialists the go-ahead to proceed.
With Mrs K’s approval, our team 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 Audi-approved roof antenna module was fitted, 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 in position, the Audi emergency call system repair was ready for final verification.
Confirming the Audi SOS Fault Fix Was Successful
Once the replacement was fitted, our Audi technicians carried out a series of checks to ensure the Audi SOS fault fix had been completed correctly and that the emergency call system was functioning as intended by the manufacturer.
Our team completed the following verification steps:
- Verified that the emergency call function reported normal operation with no active warnings.
- Cleared the stored B105413 fault code using manufacturer-level equipment.
- Ran a full system scan to confirm that no additional fault codes had been stored.
- Checked that the SOS indicator in the roof console had returned to its normal state.
All of the verification checks confirmed the repair had been successfully completed.
The GPS antenna circuit tested correctly, the emergency call system was fully restored, and no further faults were found.
Through a structured, methodical approach, our team had traced the exact cause of the Audi SOS system B105413 fault and resolved the problem within a single visit.
Once our Audi specialists had confirmed the Audi emergency call system repair was complete, they called Mrs K to let her know that her Audi A1 was ready for collection.
Mrs K was pleased to hear our team had solved the fault. She was happy with the clear communication she’d received throughout the repair process and the efficient turnaround, all while getting better than dealership value.
She drove away confident that her vehicle was back in peak working condition with the Audi SOS warning issue solved.
Audi SOS Warning? Book Your Inspection at P. Breading Motor Services
Is your Audi showing a red SOS light or an emergency call system fault message?
Getting the fault investigated early is the most effective way to confirm your vehicle’s safety systems are ready when you need them.
Emergency call faults can stem from a range of causes, including antenna failures, wiring issues, and module faults. Without structured testing and the right equipment, there’s a real risk of misdiagnosis or replacing parts that didn’t need replacing.
At P. Breading Motor Services, Southend-on-Sea, our Audi specialists use manufacturer-level tools, official technical data, and hands-on experience to investigate faults such as the Audi SOS system B105413 and repair them accurately the first time.
Here is why Audi drivers across Southend, Great Wakering and the surrounding areas 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 car is available so that you won’t be left without a vehicle during the repair.
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 P. Breading Motor Services, Southend-on-Sea, today on 01702 535710 to book your inspection.
