Audi SOS System B105413: How the GPS Antenna Fault Was Found and Repaired

“Emergency call function fault. Function partially available. Please contact workshop.”

When Mrs O noticed this warning on the dashboard of her Audi A1, it wasn’t something she could put aside.

The SOS indicator on the roof console had turned red, indicating that one of the vehicle’s safety systems had stopped working as it should.

An emergency call system fault is the kind of warning that needs dealing with straight away.

It’s the system designed to automatically place an emergency call in the event of a serious collision. When it fails, a layer of protection you’ve probably never given a second thought to is no longer there.

Wanting it resolved quickly, Mrs O brought her Audi A1 to Roade Main Garage, Northampton, for a clear answer.

Here, you’ll discover how our Audi specialists investigated the fault, what testing uncovered, and how the Audi SOS system was fully restored.

How Our Audi Specialists Assessed the SOS System Warning

When Mrs O arrived at Roade Main Garage, Northampton, our Audi specialists began by asking her to talk us through what she’d noticed. 

Listening carefully to a customer’s account before any testing begins is a priority at our garage, ensuring the investigation is aimed in the right direction from the start. Mrs O told us that a warning had appeared on the dashboard and that the SOS indicator on the roof console had gone red.

There had been no other problems with the vehicle, no recent repairs, and nothing obvious that might have triggered the fault.

With that detail gathered, our Audi technicians began the initial round of checks.

Our first checks included:

• A full visual inspection looking for any clear signs of damage.
• A system scan to retrieve any stored or active fault codes.

The visual inspection revealed nothing unusual. All components were intact, with no signs of damage or disturbance. Once the visual check was finished, our specialists moved on to the system scan.

The system scan was carried out using Audi manufacturer-level technology, with live data from the relevant control modules reviewed alongside the results.

The scan returned a single fault code:

• B105413, GPS Antenna, open circuit, with an active/static status.

What Does the B105413 Fault Code Mean?

This fault code is recorded when the vehicle’s telematics control module identifies an open circuit in the GPS antenna circuit. The GPS antenna provides the location data that Audi’s emergency call system uses to determine the vehicle’s position if an automatic emergency call is placed.

If a valid GPS signal is not received, the SOS function may be only partially available, and a warning message will appear on the dashboard.

This told our team that the vehicle’s telematics control module had detected an open circuit in the GPS antenna signal path.

A fault code on its own, though, doesn’t tell you what’s behind it.

The B105413 GPS antenna fault could have several possible origins, including the coaxial cabling, a connector issue, the antenna itself, or water ingress. Our team needed to carry out further investigation to identify the true cause of the Audi SOS fault and ensure it was repaired correctly.

What Caused the B105413 GPS Antenna Fault to Occur?

With the B105413 GPS antenna fault confirmed, the next step was to establish what had actually caused it.

A fault code identifies the affected area, but determining the root cause requires a structured investigation and targeted 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 focused 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.
• Check all connections along the circuit for signs of poor contact or corrosion.
• Remove the roof antenna module and inspect it for any evidence of water intrusion or physical damage.

The first stage of testing concentrated on continuity and resistance testing of the wiring between the emergency call module and the roof-mounted GPS antenna. All results came back within specification, ruling out a cable or connector fault.

Our Audi experts then focused their attention on the vehicle’s roof antenna module. 

After removing the shark fin antenna and conducting a detailed inspection, they discovered that the GPS antenna element within the module had failed, resulting in the open circuit indicated by the B105413 fault code.

This internal component failure was the reason the emergency call system raised the warning. 

The GPS antenna element could no longer provide a valid GPS signal to the telematics module, which explained why the SOS function had been recorded as only partially available.

How Was the Audi B105413 Fault Fix Carried Out at Roade Main Garage?

With the root cause confirmed, our Audi technicians contacted Mrs O to explain what had been found. 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 Roade Main Garage, Northampton, no repair is carried out until you fully understand the issue and have given your approval. Mrs O was happy with the findings 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 inspected for any signs of water damage or deterioration that could affect the replacement component.
• All electrical connections were checked to confirm they were secure and correctly seated.
• A new roof antenna module was installed, restoring the GPS antenna circuit used by the emergency call system.

With the replacement module in place, the Audi emergency call system repair was ready for the final stage of our process: verification.

Verifying That the Audi SOS Fault Fix Was Successful

Once the replacement was complete, our Audi technicians ran a series of checks to ensure the Audi SOS fault fix had been carried out successfully and that the emergency call system was operating as intended by the manufacturer.

Our team completed the following verification steps:

• 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.
• Verified that the emergency call function reported normal operation with no active warnings.
• Checked that the SOS indicator in the roof console had returned to its normal state.

All checks came back as expected. 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 replacing any parts unnecessarily.

The Audi A1 SOS fault was investigated, tested, and resolved in a single visit.

Once our Audi specialists had confirmed that the repair to the Audi emergency call system was complete, they contacted Mrs O to let her know that her Audi A1 was ready for collection.

Mrs O 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 Warning? Book Your Inspection at Roade Main Garage

Is your Audi showing a red SOS light or an emergency call system fault message on the dashboard?

Getting the fault assessed early is the best way to confirm that your vehicle’s safety systems are working when you need them.

Emergency call faults can have several causes, including antenna failures, wiring issues, and module issues. Without the right equipment and a structured testing approach, it’s easy for the fault to be misdiagnosed or for parts to be replaced that didn’t need replacing.

At Roade Main Garage, Northampton, 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 repair them correctly the first time.

Here is why Audi drivers across Northampton, Milton Keynes and nearby 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.
• Better value compared to main dealer pricing, with no compromise on quality.

Join the {{review-count}} local 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 Roade Main Garage, Northampton, today on 01604 862262 to book your inspection.