Peugeot 2008: Sos Battery Replacement

Cost estimate:
Battery ~$10–20, DIY labor 30–60 minutes.
Dealer replacement: $150–300.

To replace the emergency SOS (eCall) battery in a Peugeot 2008, you typically need to access the Autonomous Telematics Box. Location & Key Details

Location: The battery is housed within the emergency call module, which is generally located behind the dashboard near the steering column or within the overhead console.

Battery Type: It uses a specialized backup battery specified by Peugeot (often a rechargeable Ni-MH or Lithium-ion pack, not a standard CR2032).

Replacement Indicator: A failing SOS battery is typically indicated by a flashing red light on the SOS button or a dashboard warning message. General Replacement Procedure

While specific steps can vary by year (Mk1 vs. Mk2), the standard process follows these steps:

Preparation: Disconnect the vehicle's main 12V battery in the engine compartment to avoid electrical shorts.

Access: Remove the trim panels around the overhead console or the lower dashboard trim to reach the telematics unit.

Removal: Unplug the connector from the telematics box and carefully remove the battery cover.

Installation: Swap the old battery for a genuine Peugeot replacement.

Reset: Reconnect the main battery. The system may require a software reset or "configuration" using a diagnostic tool (like Peugeot ServiceBox or DiagBox) to clear the error code.

For model-specific diagrams, you can download the official handbook from Peugeot ServiceBox by selecting your vehicle's registration date. peugeot 2008 sos battery replacement

The story of replacing a Peugeot 2008 SOS battery often starts with a mysterious blinking red or orange light

on the dashboard or overhead console, signaling a fault in the emergency call system

. Unlike the main car battery, this small backup battery is part of the Autonomous Telematics Box

, designed to power emergency calls even if the vehicle's main power fails during an accident. French Car Forum The Replacement "Adventure"

Replacing this battery is famously more complex than a standard battery swap: Hidden Location

: In many Peugeot 2008 models, the SOS battery is tucked deep under the dashboard near the steering column or within the overhead console The "Dashboard" Challenge : Some owners have been told by mechanics that the entire dashboard

needs to be removed to access the telematic unit, making a small battery replacement a labor-intensive project. System Lifespan

: These batteries typically have an autonomy of about one year without loss of capacity and are expected to lose roughly 75% of their power after eight years Warning Signs

: A flashing orange light often means the battery is getting weak and not holding a full charge, while a solid red light might indicate a permanent fault in the telematic unit itself. French Car Forum Key Tips for Owners Diagnostic First

: Before tearing into the dash, experts suggest checking for specific fault codes (like

) at a workshop to confirm if it’s just the battery or the entire telematic unit that has failed. Safety Precaution disconnect the main 12V vehicle battery Cost estimate : Battery ~$10–20, DIY labor 30–60

before attempting to access the SOS module to avoid shorting out sensitive electronics. Professional Help

: Because of the specialized location and the need to reset system faults, many owners prefer using a qualified Peugeot workshop

Are you seeing a specific warning light color on your SOS button right now? SOS Light Flashing Orange - French Car Forum 20 May 2023 —

Replacing the SOS (Emergency Call) backup battery in a Peugeot 2008

is a specific task required when the system displays a "SOS Limited Functionality" warning or the button flashes orange/red. This battery ensures the car can still call emergency services even if the main vehicle battery is destroyed in a collision. 1. Battery Location & Diagnosis

The Warning: A solid or flashing orange/red light on the SOS button typically indicates the internal backup battery is weak or has failed.

The Component: The battery is housed inside the Autonomous Telematics Box (ATB) or Independent Telematic Unit.

Location: In the Peugeot 2008 (especially 2019+ models), this unit is typically found behind the dashboard, often near the steering column or behind the glovebox. Some variants may house it near the overhead console. 2. Required Tools and Parts

Part: Use only the Peugeot-authorized rechargeable backup battery (specific part numbers vary by model year, so confirm with a Peugeot Specialist). Tools:

Plastic trim removal tools (to avoid damaging the dashboard). Socket set (10mm for main battery terminal removal).

Torx screwdrivers (usually T20) for dashboard panel removal. 3. Replacement Procedure Reconnect the main car battery

Replacing this battery is more complex than a standard car battery change and often requires a "BSi reboot" or diagnostic reset to clear the error.

Safety First: Ensure the ignition is off. It is highly recommended to disconnect the vehicle's main 12V battery negative terminal first to prevent electrical shorts during dash removal.

Access the Unit: Carefully remove the trim panels under the steering column or behind the glovebox to locate the Telematics Box.

Extract the Unit: You may need to unscrew or unclip the module to reach the small battery compartment on its side.

Swap the Battery: Open the battery cover on the unit, disconnect the small wiring plug, and replace it with the new cell.

Reassemble: Secure the module and reinstall the dashboard trim.

Reset the System: Reconnect the main 12V battery. In many cases, the "SOS" warning will not disappear until you perform a "TCU back-up battery test" using a diagnostic tool like DiagBox to tell the car the battery has been replaced. 4. Why It Fails

Age: These batteries typically have an "authorised loss" of capacity after 8 years, but many fail after 4–5 years.

Lack of Use: If the car is not driven regularly, the backup battery may not receive enough charge from the main system to stay healthy.

If you are uncomfortable with dashboard removal, many owners prefer visiting a Certified Dealership as they have the specific software required to register the new battery to the car's computer. Where is the battery for the SOS button? just need to know

Reconnect the main car battery.