Peugeot 2008 Sos Battery Replacement May 2026

Peugeot 2008 SOS battery replacement

Overview

The SOS (emergency call) system in the Peugeot 2008 is part of the vehicle’s telematics/safety module and uses an internal backup battery to ensure the unit can operate briefly if the vehicle’s main electrical supply is lost. Replacing the SOS/emergency-call battery requires care: incorrect handling can disable the emergency system, trigger fault codes, or violate vehicle warranty/repair policies. Below is a detailed, practical guide covering identification, safety, step-by-step replacement, troubleshooting, and post-replacement checks.

Step 5: Install the New SOS Battery

• If soldering: Solder the new battery wires to the same points (red to positive, black to negative). Use heat shrink tubing to insulate.
• If plug-in: Connect the new battery.
• Secure the new battery with double-sided foam tape to prevent rattling.

• If the light remains on, you will need an OBD2 diagnostic scanner (like a Foxwell, Launch, or Autel that supports French cars) or a trip to a mechanic.
• Go to Body Computer (BSI) -> Repair -> Confirmation of SOS Battery replacement. This tells the computer a new battery has been fitted.

• Gently pry off the plastic cover around the SOS and Peugeot Connect buttons.
• Unscrew any visible T20 screws.
• Unclip the whole unit by inserting trim tools between the headliner and console.

6. Important Warnings

• ⚠️ Do not ignore the warning – the system may drain your main car battery if the SOS battery is shorted.
• ⚠️ Do not use a standard Li-ion 18650 – wrong voltage or capacity can damage the module.
• ⚠️ After replacement, the system may need a diagnostic reset (Diagbox or OBD2 tool) – though many Peugeot 2008s auto-reset after a few drive cycles.

Safety First: Ensure the vehicle is off. For some models, it is recommended to disconnect the main car battery negative terminal to avoid electrical shorts. peugeot 2008 sos battery replacement