However, this backup battery has a finite lifespan. Typically, it lasts , depending on driving conditions and temperature. When it fails, the car’s diagnostic system detects low voltage or a failed battery and triggers the dreaded “SOS faulty” message on your dashboard or infotainment screen.
While the main vehicle battery is easily accessible under the bonnet, the SOS battery requires more careful disassembly. Preparation
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: Carefully pry down the plastic roof console housing (where the SOS button and interior lights are). It is held in by clips. peugeot 2008 sos battery replacement
It is a built-in emergency call system. In a serious accident, it automatically contacts emergency services, providing your vehicle's exact location for quicker assistance.
The "SOS Battery" warning usually refers to the backup battery located inside the Peugeot SOS Telematics Unit (localization unit) . This battery is designed to allow the emergency call system to function even if the car's main battery is severed in a crash.
(Part number: 920968180470 or similar depending on production year). : T-20 and T-25 bits. However, this backup battery has a finite lifespan
| Issue | Symptoms | DIY Difficulty | Solution | | :--- | :--- | :--- | :--- | | | "SOS Battery Low" message on dashboard. | High (Dashboard removal required) | Dealership advised. | | Key Fob Battery | "Key battery low" message; reduced range. | Low | Replace CR2032 yourself. | | Main Battery | Car won't start; clicking noises; "Economy Mode Active". | Medium | Replace (use AGM for Start-Stop models) and perform BMS reset. |
: Snap the access door closed. Reconnect all color-coded aerial plugs and electrical looms back into the primary telematics box. Phase 4: Reconnecting the Car System
: Reinstall the module and panels. Turn on the ignition; the warning light should disappear after a self-test period. Technical Specifications for Main Battery While the main vehicle battery is easily accessible
If your key fob range is decreasing or the car displays "Key battery low," this is a simple DIY fix.
Reconnect the wiring harnesses to the infotainment screen and slide the screen back into position.
Note: These steps are intentionally general because exact disassembly varies by year and trim. If your model’s SOS battery is non-replaceable, the telematics unit must be replaced as an assembly.
The dealership option often includes a software update, which may be necessary to clear error codes and ensure the system functions correctly. It's a more expensive but hassle-free option.
The Peugeot 2008 's , or Peugeot Connect SOS , is a vital safety feature designed to automatically contact emergency services in the event of an accident. However, many owners eventually encounter a "Emergency Call System Fault" warning, which is most often caused by a depleted internal backup battery. Understanding the SOS Battery System