Description
DELPHI alarm control unit for Citroën and Peugeot vehicles.
High-quality replacement alarm control unit manufactured by Delphi, suitable for a range of PSA group vehicles. This module handles alarm monitoring and signalling functions (doors, boot, interior sensors, siren output and central locking interface) and is commonly searched by its OEM numbers 9657384680 or 6680Q7. Ideal for professional workshops and experienced DIY mechanics who need a direct-fit unit to restore alarm functionality and stop nuisance warnings or a non-functioning alarm system.
Technical Information
- Manufacturer: Delphi
- Model: Alarm Control Unit for Citroën / Peugeot
- Product Codes: 9657384680, 6680Q7
- Additional Numbers: Stellantis references as listed by suppliers
- Compatible Vehicles: Citroën C4, Citroën C4 Picasso, Citroën C5, Citroën C6, Citroën C8, Peugeot 206, Peugeot 307, Peugeot 407, Peugeot 607, Peugeot 807
Installation And Recommendations
Before starting any work, always disconnect the vehicle battery and follow the manufacturer’s safety procedures to avoid electrical damage. The alarm control unit is typically located inside the passenger compartment, commonly under the dashboard, behind trim panels or near the central fuse box. Access usually requires removing lower dash panels or glovebox trims.
- Disconnect negative battery terminal and wait a few minutes to allow systems to power down.
- Remove the trim panels to access the module mounting location and disconnect all wiring connectors carefully, releasing any locking tabs.
- Unfasten mounting screws or clips and remove the faulty unit.
- Install the replacement unit, secure mounting, reconnect wiring harnesses and restore battery connection.
- Check alarm and central locking functions. Remote control re-synchronization or basic coding may be required for full functionality.
If the vehicle requires coding, key pairing or advanced configuration, these procedures are best carried out with PSA diagnostic equipment such as DiagBox, Lexia or PP2000 by a trained technician.
Common Causes Of Failure
- Water ingress or moisture leading to corrosion of connectors or internal circuitry.
- Electrical surges, poor grounding or battery voltage spikes damaging electronic components.
- Connector corrosion or loose contacts causing intermittent operation or complete failure.
- Physical damage from impacts or incorrect handling during previous repairs.
- Age-related component degradation after many years in service, especially on older vehicles.
Replacement Tips For Mechanics And DIY
- Label connectors and take photos before disassembly to ensure correct reassembly.
- Inspect related wiring, connectors and ground points for corrosion or damage and repair as needed to prevent repeat failure.
- After installation, verify all alarm zones (doors, boot, interior sensors) and remote functions work correctly; perform a system test.
- Allow experienced technicians to handle coding or key programming when required to guarantee proper integration with vehicle security systems.
This Delphi alarm control unit is a practical search-targeted replacement for garages and experienced DIYers looking to resolve alarm faults on affected Citroën and Peugeot models. Use the OEM numbers 9657384680 or 6680Q7 when searching to quickly find the correct unit for your vehicle.
