Description
Battery State-Of-Charge Unit For Citroën And Peugeot Vehicles
This Battery State-of-Charge (SoC) unit is designed for Citroën and Peugeot models and monitors battery condition to ensure correct charging strategy, energy management and reliable vehicle start-up. Ideal for professional workshops and experienced DIY mechanics looking for a direct replacement part by product code (9676592080 / 9802043480 / 6500KT). The unit communicates battery status to the vehicle network and helps optimize alternator behavior and energy-saving functions.
Technical Information
- Manufacturer: Stellantis
- Model: Citroën C4 II; Citroën C4 Picasso; Citroën C4 Picasso II; Peugeot 3008 I; Peugeot 308; Peugeot 5008 I
- Product Codes: 9676592080, 9802043480, 6500KT
- Additional Numbers: 9802043480, 6500KT
Compatibility
Fits the listed Citroën and Peugeot models that use the original equipment part numbers above. Search by product code for fastest match when ordering.
Function
The unit measures the battery state-of-charge and state-of-health parameters and sends this information to the vehicle’s control modules. Based on these signals the charging system (alternator/regulator) adapts charging profiles, start/stop systems are managed and the vehicle’s energy strategy is optimized to avoid deep discharge and to extend battery life.
How Replacement Is Performed
1. Park on a level surface, switch off ignition and engage the parking brake. 2. Disconnect the negative battery terminal and wait a few minutes to allow electronic capacitances to discharge. 3. Locate the unit (often mounted near the battery or inside the BSM/engine compartment fuse box area), remove protective covers and unplug electrical connectors. 4. Unscrew the mounting fasteners, replace the unit and refit connectors firmly. 5. Reconnect the battery and verify proper system operation. If applicable, perform any required initialization or adaptation with a suitable diagnostic tool.
Installation Recommendations
- Always disconnect the negative battery terminal before starting work and follow the vehicle manufacturer’s removal/installation procedures.
- Inspect connectors and wiring for corrosion or heat damage; clean and secure connectors before reassembly.
- Use correct torque for fasteners and ensure sealing and clips are properly refitted to prevent moisture ingress.
- If the vehicle displays battery or charging-related fault codes after replacement, perform diagnostics and adaptation with a professional-grade PSA diagnostic tool.
Most Common Failure Reasons
Failures are usually caused by prolonged exposure to voltage irregularities (repeated deep discharges, jump-starts, badly regulated alternator), water or corrosion at electrical connectors, thermal stress in the engine bay, or degradation after many years of service. In many cases a weakened or failing battery accelerates wear on the SoC unit because of increased electrical stress.
Why Choose This Unit
Replacing the battery state-of-charge unit with a part that matches the OE product codes restores correct charging logic and supports reliable start/stop and energy-management functions — essential for modern Citroën and Peugeot vehicles. Use the product codes above to find the exact match for your vehicle.
