The Alarm Control Unit Delphi 9663392880 is a direct-fit security module for a range of Citroën and Peugeot models. Designed to manage vehicle alarm functions, central locking inputs and sensor signals, this alarm module is often searched for by its part number (9663392880) and is a common replacement item in workshops and for DIY repairs. Suitable for mechanics and experienced enthusiasts, the unit restores proper alarm behaviour such as door/shock sensor monitoring, siren activation and communication with other vehicle modules.

Key Features

• Direct replacement for compatible Citroën and Peugeot models (see Technical Information).
• Handles alarm sensors, central locking signals and siren outputs.
• Compact module designed for integration with the vehicle’s security system and wiring harness.
• Frequently identified by OE code 9663392880 for quick lookup and ordering.

How It Works

The alarm control unit monitors inputs from door contacts, hood/trunk switches, shock sensors and sometimes glass-break sensors. When a fault or intrusion is detected, it triggers the siren and flash sequence and can interact with central locking and immobiliser-related signals. Proper connection to the vehicle wiring harness and correct configuration ensure reliable alarm operation.

How To Replace

• Prepare: Park the vehicle on a level surface, engage the handbrake and remove the ignition key.
• Disconnect the Battery: Always disconnect the negative battery terminal before starting work to avoid short circuits or module damage.
• Locate the Module: Alarm units are typically mounted under the dashboard, behind trim panels or near the fuse/relay box. Remove the necessary panels to access the unit.
• Unplug Connectors: Carefully release locking tabs and unplug the wiring harness connectors. Inspect connectors for corrosion or bent pins.
• Swap the Unit: Remove mounting screws, fit the replacement unit, secure it and reconnect all connectors.
• Test: Reconnect the battery and verify alarm, central locking and sensor responses. If required by the vehicle, perform any coding or configuration with the appropriate diagnostic tool.

Installation Recommendations

• Always disconnect the negative battery terminal before removal and installation to protect the unit and vehicle electronics.
• Inspect wiring and connectors for corrosion or water damage and repair as needed before fitting the new module.
• Ensure secure mounting and correct connector seating to prevent intermittent faults from vibration or moisture.
• Coding/Programming: Depending on the vehicle and system integration, the replacement module may require configuration or coding with a PSA-compatible diagnostic tool (DiagBox/Lexia/PP2000). Follow manufacturer procedures for final checks.
• Use protective gloves and basic hand tools; avoid prying on plastic housings to prevent damage.

Most Common Failure Reasons

• Moisture Ingress And Corrosion: Water leaks or condensation can corrode pins and circuit boards, causing intermittent or permanent failure.
• Electrical Surges And Short Circuits: Faulty wiring, jump-starts or battery problems can damage internal electronics.
• Connector And Wiring Damage: Broken, bent or oxidised pins in the harness lead to loss of signals and erratic behaviour.
• Age And Component Wear: Over time capacitors and solder joints can degrade, especially in older vehicles.
• External Damage: Physical impact or improper removal/installation can damage the housing or internal circuitry.

Technical Information

• Manufacturer: Delphi
• Model: Citroën C4, Citroën C4 Picasso, Citroën C5, Citroën C6, Citroën C8, Peugeot 206, Peugeot 307, Peugeot 407, Peugeot 607, Peugeot 807
• Product Codes: 9663392880
• Other Numbers: Not Available

Compatibility And Notes

This alarm control unit is compatible with a number of Citroën and Peugeot models from the era when this Delphi unit was specified. It is commonly looked up by part number 9663392880. Before installation, verify physical connector type and mounting location against the vehicle to ensure a match. If the vehicle requires module coding or system adaptation, perform the procedure with suitable PSA diagnostic equipment to guarantee full functionality.

Why Buy This Unit

Replacing a faulty alarm control module with the correct part restores reliable vehicle security and avoids nuisance alarms or failures to arm/disarm. For professional fitment or experienced DIYers, this unit allows a straightforward swap when the correct part number and connector match are confirmed.

This alarm control unit is designed for integration with the vehicle’s security and central locking systems. It manages alarm triggers from door and interior sensors, controls the siren outputs and remote locking signals, and communicates with the car’s body/immobilizer electronics where applicable. Ideal for professional workshops and experienced DIY mechanics who need a direct replacement unit for affected Citroën and Peugeot models.

Compatible Vehicles

Commonly fitted to the following models: Citroën C4, Citroën C5, Citroën C6, Citroën C8, and Peugeot 206, Peugeot 307, Peugeot 407, Peugeot 607, Peugeot 807. Check the product codes below to match the correct variant for your vehicle.

Technical Information

• Manufacturer: DELPHI
• Model: Alarm Control Unit For Citroën / Peugeot
• Product Codes: 9650242080, 6680Q1, 6680L0
• Other Numbers: NFP (as referenced in original listing)

Installation Recommendations

• Disconnect the vehicle battery before beginning work and observe basic ESD (electrostatic discharge) precautions to protect the electronic unit.
• Access the unit following manufacturer body trim removal instructions; alarm modules are often mounted under dashboards, in fuse boxes, or behind trim panels.
• Carefully unplug all connectors and label them if necessary to ensure correct re-connection.
• After mechanical installation, the unit may require coding or pairing with the vehicle’s central systems using a professional diagnostic tool—ensure the vehicle’s electronic modules are scanned and any related fault codes are cleared.
• Perform a full function test: lock/unlock with remote, trigger door and interior sensors, and verify siren output to confirm correct operation.

Replacement Procedure

Typical replacement steps: 1) Remove negative battery terminal and wait a few minutes; 2) Remove trim panels to access the alarm unit; 3) Disconnect connectors and remove the unit from its bracket; 4) Install the new unit, reconnect connectors and reassemble trim; 5) Reconnect the battery and complete any required programming or diagnostics. For efficient work, have a scan tool and wiring diagram available.

Why This Part Fails Most Often

Alarm control units fail primarily due to moisture ingress and corrosion, electrical surges (e.g., from jump-starts or faulty alternators), degraded solder joints or aged electrolytic components, and physical damage from impacts or improper previous installations. Environmental exposure and long service life accelerate degradation—failures typically manifest as intermittent alarms, inability to arm/disarm, or loss of siren/remote functions.

This replacement unit is a practical choice for mechanics and experienced DIYers who recognize the product codes 9650242080 / 6680Q1 / 6680L0 when searching for compatible alarm modules for Citroën and Peugeot vehicles. Order now to restore reliable vehicle security and central locking performance.

This Delphi alarm control unit is a direct-fit electronic module designed for a range of Citroën and Peugeot models. Supplied with OE references 9657384680 and 6680Q7, the unit manages vehicle intrusion detection, siren output and interfaces with central locking and alarm sensors. Ideal for professional workshops and experienced DIY mechanics, this module restores alarm functionality and security behaviour to affected vehicles when replacing a faulty unit.

Function And Role

The Alarm Control Unit monitors door, boot and bonnet switches, shock sensors and remote locking inputs. When a breach is detected it triggers the siren and can interact with the central locking system and immobiliser circuits. The unit also provides status signals to the vehicle’s comfort and body control systems.

Compatible Models

• Citroën C4
• Citroën C4 Picasso
• Citroën C5
• Citroën C6
• Citroën C8
• Peugeot 206
• Peugeot 307
• Peugeot 407
• Peugeot 607
• Peugeot 807

Technical Information

• Manufacturer: Delphi
• Model: Alarm Control Unit
• Product Codes: 9657384680, 6680Q7
• Additional Numbers: Stellantis Reference 9657384680; Supplier Code 6680Q7

Installation Recommendations

• Disconnect The Battery Before Work To Prevent Short Circuits And Protect The Electronics.
• Locate The Unit Typically Behind The Glovebox Or Under The Dashboard Depending On Model; Remove Trim Panels Carefully.
• Observe Connector Locking Tabs And Release Them Gently To Avoid Damaging Pins.
• Inspect Wiring Harness And Ground Points For Corrosion Or Damage; Repair Any Faulty Wiring Before Installing The Replacement Unit.
• After Installation, Verify Alarm And Central Locking Functions; Check Fuses And Related Relays If Any Function Is Not Restored.
• In Some Cases The Replacement Unit Will Be Plug-And-Play If It Carries The Same Coding; If The Unit Has Different Coding Or Remote Keys Are Not Recognised, Additional Synchronisation Or Programming May Be Required By A Specialist With PSA Diagnostic Tools.

Most Common Failure Causes

• Moisture Ingress Causing Corrosion Of Connectors Or Internal Components.
• Electrical Surges Or Faulty Charging Systems Leading To Component Damage.
• Connector Or Wiring Damage From Rodents Or Mechanical Wear.
• Aging Components Such As Capacitors Degrading Over Time, Especially On Higher Mileage Vehicles.
• Impact Damage From Accidents Or Improper Handling During Previous Repairs.

Why Choose This Unit

Featuring OE cross-references 9657384680 and 6680Q7, this Delphi alarm control unit offers reliable fitment for many Citroën and Peugeot models. The module is suitable for garages and competent DIY mechanics who need a straightforward replacement part that restores alarm and security functions. Including clear product codes in the listing increases findability for customers searching by part number.