If your car struggles to start or electronics are flickering, you may need to replace the main battery under the hood.
Crucial Warning for Start-Stop Models: If your Peugeot 2008 has the Start-Stop system (engine cuts out at red lights), it uses an AGM (Absorbent Glass Mat) or EFB battery. You cannot replace this with a standard lead-acid battery. The car's charging system will overcharge a standard battery, leading to failure.
Steps:
Sometimes the error code remains stored. You can clear it using an OBD2 scanner (e.g., Diagbox or a generic scanner with Peugeot support). Alternatively, drive the car for 10–15 minutes; the system often resets itself once it sees the new battery voltage is stable.
If you want, tell me your Peugeot 2008 model year and whether you can access the overhead console (or send a photo of the module area) and I’ll provide a model-specific removal and part-identification walkthrough.
SOS battery (also known as the "emergency call" or "backup" battery) in a Peugeot 2008
is a critical component of the Peugeot Connect SOS & Assistance system. This internal battery powers the vehicle's telematics unit to ensure emergency services can be reached even if the car's main 12V battery is disconnected or damaged during an accident. Key System Details peugeot 2008 sos battery replacement
: Powers the manual or automatic (airbag-triggered) emergency call function. Service Life : Designed to last roughly
with an authorized capacity loss of up to 75%. Some specialized garages note that failure can occur earlier if the battery cannot power the module for more than five minutes. Warning Indicators Red Flashing/Solid Light
: Indicates a fault with the emergency system, often a flat or faulty internal battery. Orange Blinking Light
: On newer models, this may indicate the 10-year SOS service subscription has expired. Battery Location & Access
Unlike the main vehicle battery under the hood, the SOS battery is located inside the Autonomous Telematics Box (BTA)
: Typically found behind the dashboard, near the steering column, or behind the instrument cluster. Access Difficulty If your car struggles to start or electronics
: Replacing this battery is considered a "heavy" task, often requiring the removal of dashboard panels or the instrument display. Replacement Procedure
Because the SOS system is a safety-critical component, it is highly recommended to have the replacement performed by a Peugeot Authorized Repairer or a qualified technician.
: A diagnostic scanner should be used to confirm the "Internal Battery Fault" (e.g., fault code FD87) before dismantling the dash. Safety Precautions
: Disconnect the vehicle’s main 12V battery before beginning work on the telematics module. Dismantling
: Remove the trim below the dashboard display or the display unit itself to reach the BTA module.
: Replace the internal cell (typically a specialized Ni-MH or Li-ion pack, not a standard AA battery) with the specific part number provided by Peugeot. Software Update Sometimes the error code remains stored
: Professionals often carry out a software update on the telematics module simultaneously to ensure system stability. Estimated Costs
While individual battery cells can sometimes be found online for moderate prices, the labor-intensive nature of the dashboard removal means dealer or garage costs often range from £150 to £300 ($190 to $380) including parts and labor. near you to handle this replacement? SOS Light Flashing Orange - French Car Forum
Important Note: 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.
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.
This battery is not under the hood. It is typically located in a black box behind the dashboard on the passenger side (often behind the glovebox or near the A-pillar).
If you own a Peugeot 2008, you may eventually encounter a warning light or message regarding your battery. However, the term "battery replacement" can refer to two very different things:
This guide covers all three, with a specific focus on the often-misunderstood SOS battery, which is a common point of failure in Peugeot vehicles.