Step-by-step reality check:
A: If your car is under factory warranty, the dealer should replace it for free. Doing it yourself could void warranty on the telematics unit. Check with your dealer first.
Replacing the SOS emergency call battery in a Peugeot 2008 is a specialized task distinct from changing the main vehicle battery. While the main car battery is easily accessible under the hood, the SOS backup battery (part of the Peugeot Connect SOS & Assistance system) is typically tucked away within the dashboard or overhead console to ensure it remains functional during a serious collision. Understanding the Peugeot SOS System
The SOS system is designed to provide emergency assistance even if the car's main battery is disconnected or damaged in an accident.
The SOS Battery: This is a small, dedicated backup battery that powers the telematics unit. It generally needs replacement every 4 to 5 years.
Warning Signs: You may need a replacement if you see an "Emergency Call System Fault" message on the dashboard, if the SOS button flashes orange or red after starting the car, or if it remains constantly illuminated.
Placement: In most Peugeot 2008 models, this battery is located inside the Telematic Unit (BTA/BTA2), which is often found behind the dashboard's head unit (radio) or near the glovebox area. Step-by-Step Replacement Guide
Because this involves sensitive electronics, many owners prefer to visit a local Peugeot dealer to ensure the system is properly re-coded. If you are comfortable with DIY:
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.
Access the Module: Use trim removal tools to carefully remove the plastic panels around the center console or radio head unit. You may need Torx screwdrivers to unscrew the telematics box.
Locate the Battery Compartment: The backup battery is usually a small, rectangular lithium-ion pack housed within a clip-on compartment on the module.
Exchange the Battery: Unplug the small wiring harness connecting the old battery and replace it with a genuine Peugeot replacement part to ensure compatibility.
Reassemble and Test: Reinstall the module and panels. Turn on the ignition; the warning light should disappear after a self-test period. Technical Specifications for Main Battery peugeot 2008 sos battery replacement
If your "SOS fault" is actually related to low voltage from the vehicle's primary power source, you may need to replace the main battery instead. Standard Peugeot 2008 Spec Replacement Requirement Main Battery 12V L2/L3 EFB or AGM (for Start/Stop) 10mm socket wrench, terminal sanding SOS Battery Specific Peugeot Backup Lithium Pack Trim tools, potential software reset
For official parts and certified assistance, you can browse Peugeot's Official Parts and Service page or consult reviewers on forums like Peugeot Forums for model-specific advice.
Replacing the SOS battery in a Peugeot 2008 is a common task when the SOS light begins flashing orange or stays lit, indicating the internal backup battery for the telematic unit is failing Identifying the Need for Replacement The Warning
: A solid or flashing orange SOS light typically indicates that the telematic unit's backup battery is no longer holding a sufficient charge.
: Diagnostic assessments often show that these batteries fail when they can no longer power the module for the required emergency duration (typically at least 5 minutes). Location & Battery Type
: In the Peugeot 2008, the SOS battery is located within the Independent Telematic Unit
. For many models, this unit is found behind the dashboard display or within the overhead console. Battery Type
: This is a specific telematic backup battery, not a standard AA or AAA. You should use the exact replacement part specified by Peugeot for your vehicle's VIN. Replacement Process
While the main vehicle battery is easily accessible under the bonnet, the SOS battery requires more careful disassembly. Preparation
: Disconnect the vehicle's main 12V battery first to prevent electrical shorts or accidental deployment of emergency systems. Accessing the Unit
Carefully remove the trim panels (often the overhead console or dash display trim) using plastic pry tools to avoid damaging clips.
Unscrew the telematic module to reveal the battery compartment. Swap the Battery Step-by-step reality check: A: If your car is
: Remove the old backup battery and click the new one into place. Reassembly & Testing
: Reinstall the module and trim. Reconnect the main vehicle battery. The SOS light may take a short drive to recalibrate and turn off. Where to Find Parts & Help
For this specific safety-related part, it is best to use official channels: Official Parts : You can find the correct battery through the Peugeot Services Store or a local parts department. Expert Assistance
: If the light remains red or orange after replacement, you may need a software update or a telematic unit reset performed by a specialist like Oaktree Garage SOS Light Flashing Orange - French Car Forum
Replacing the SOS (emergency call) battery in a Peugeot 2008 is a specialized task because the battery is not part of the main engine battery system. It powers the autonomous telematics unit, which ensures the SOS system works even if the car's main power fails. Key Details for SOS Battery Replacement Symptoms of Failure : The most common sign is a flashing red light
on the SOS button or a "Backup Battery Fault" message on the dashboard. : The battery is housed within the autonomous telematics box . Depending on your specific model year: It is often located under the dashboard near the steering column In some versions, it may be found within the overhead console near the interior lights. Battery Type
: This is a specific rechargeable backup battery (often a Ni-MH or Li-ion pack) rather than a standard button cell or car battery. You should use the exact part number specified in your Peugeot Service Box handbook based on your VIN. Replacement Procedure Safety First : Disconnect the vehicle's main 12V battery before starting to avoid electrical shorts.
: Remove the relevant trim panels (either the lower dash or the overhead console) carefully to avoid breaking plastic clips.
: Unplug the old battery pack from the telematics module and connect the new one.
: Some models may require a diagnostic tool to clear the fault code and "tell" the car a new battery has been installed. Service Box Service Information Estimated Lifespan Approximately 8 years (with authorized loss of 75%). Difficulty Moderate (may require removing dashboard trim). Recommendation If the light is red, the battery is likely flat or faulty.
To replace the SOS backup battery in a Peugeot 2008, you typically need to access the Autonomous Telematics Box (ATB), which powers the emergency call system. Quick Summary of Location & Tools
Location: Most commonly located behind the overhead console (near the SOS button itself) or within the telematics unit under the dashboard, often near the steering column. Warning : The SOS module is often connected
Tools Needed: A small flathead screwdriver (to pry plastic covers) and a replacement battery of the specific type recommended by Peugeot (check your manual for exact specs). Replacement Procedure
Preparation: Turn off the ignition and disconnect the vehicle's main 12V battery in the engine bay to avoid electrical surges or accidental SOS triggers. Access the Unit:
If in the overhead console: Use a plastic prying tool or screwdriver to gently unclip the cover panel where the SOS button is located.
If in the dashboard: Access may require removing trim panels near the steering column to find the telematics module.
Remove Old Battery: Unclip the battery cover from the telematics box and remove the old cell from its housing.
Install New Battery: Insert the new battery, ensuring the polarity (+/-) matches the markings on the unit.
Reassemble & Test: Clip the covers back into place, reconnect the main vehicle battery, and wait a few minutes for the system to re-initialize. Symptoms of a Failing SOS Battery The SOS button light flashes red or remains orange.
An "Emergency call system failure" or "SOS fault" message appears on the dashboard. The system is unresponsive when the button is pressed.
Note: In many cases, if the light is flashing red and the battery replacement does not clear it, the system may require a software reset or diagnostic clear at a Peugeot dealership using their official tools.
Here’s a step-by-step guide for replacing the SOS backup battery in a Peugeot 2008 (typically 2016–2020, second generation may vary slightly). This battery powers the emergency call system (eCall) in case the main car battery fails.
Warning: The SOS module is often connected to the airbag system. Disconnect the car’s negative battery terminal and wait 10–15 minutes before starting.