The Volkswagen SOS emergency call fault is a widespread issue affecting VAG vehicles built on the MQB platform.
This Volkswagen came to us with one of the most common faults found on newer models: "SOS: Emergency call function faulty".
A red light on the SOS button, irritating warning messages and no communication with the module. Sound familiar? The truth is, it's not just a software glitch.
What causes the Volkswagen SOS emergency call fault?
- A faulty OCU module
- A conflict between the infotainment system and the SOS module
- An incorrect checksum
- Sometimes even… interference from the 5G network
Here's what we did in this case:
- We calculated a new checksum (something 99% of workshops can't do, so they recommend replacing the module straight away).
- We updated the firmware to the latest version.
- We synchronised the infotainment system with the SOS module.
Because we know what we're doing… If you're seeing an SOS warning on your Volkswagen, don't start replacing modules blindly.
Another SOS fault fixed – without unnecessary expense!
Another car spared a module replacement costing thousands of leva.
The cause? A common fault that prevents many of the driver assistance systems from working.
Advice from Kris Mladenov: Getting the diagnosis right always saves money.