Peugeot 2008 Sos Battery Replacement [best] -

"SOS Emergency Call System Failure" or "Telematics Unit Fault."

While not an MOT failure in most regions (check local laws), a functioning SOS system is a safety feature. In a serious accident where you cannot call for help, the eCall system could save your life. Replacing the SOS battery is a cheap, DIY-friendly fix compared to replacing the entire TCU (Telematics Control Unit), which can cost €500–€1000. peugeot 2008 sos battery replacement

: A red or flashing light on the SOS button is the car's way of telling you the backup power is insufficient to maintain a call for more than five minutes. Replacement Complexity "SOS Emergency Call System Failure" or "Telematics Unit