This Antenna Impedance Module (AM/FM1 impedance adapter) is a direct-fit component used to ensure proper matching between the vehicle antenna and the factory radio. Designed for professional workshops and experienced DIY enthusiasts, the module restores correct signal level and reduces reception issues caused by impedance mismatch. Commonly searched under part numbers 9662924980, 6561RK or 9662924980-00, it is especially relevant for Citroën C5 X7 installations where antenna signal quality or radio reception has degraded.

Function And Benefits

The unit adapts the antenna impedance to the radio input across AM and FM bands, improving signal transfer and minimizing reflections that cause noise or weak reception. Replacing a faulty impedance module typically resolves symptoms such as poor AM reception, weak FM signal, intermittent audio dropouts, or increased static. The module is compact, easy to install when access to the antenna lead is available, and preserves OEM radio performance when correctly fitted.

How Replacement Is Performed

Replacement is straightforward for trained mechanics or competent DIYers with basic trim removal skills. Locate the antenna module in the vehicle (often inline on the antenna coax or near the antenna base/roof area), disconnect the negative battery terminal, remove surrounding trim or headliner as needed to access the connector, unplug the old module and replace with the new unit, then test radio reception before reassembling. Avoid excessive bending of the coax cable and ensure connectors are fully seated.

Technical Information

• Manufacturer: Stellantis (Citroën/Peugeot)
• Model: Citroën C5 X7
• Product Codes: 9662924980; 6561RK; 9662924980-00
• Other Numbers: 9662924980-00

Installation Recommendations

• Disconnect the battery before starting work and follow safe workshop practices.
• Access the module by removing the necessary trim or headliner panels without forcing clips.
• Inspect coax connectors and antenna cable for corrosion or damage; clean contacts if required.
• Use proper coax handling—avoid sharp bends, kinks or stretching that degrade signal.
• After fitting, verify AM/FM reception across multiple frequencies before final reassembly.

Most Common Reasons For Failure

The module typically fails due to moisture ingress and corrosion at connectors, physical damage to the antenna cable, or electrical overstress (for example lightning strike or surges). Symptoms include reduced signal strength, intermittent reception, increased noise, or loss of band reception. Regular inspection of cable integrity and connector condition helps prevent premature failures.

Note For Mechanics And DIYers

This part is often looked up by its product numbers (9662924980, 6561RK, 9662924980-00). It is intended as a replacement component for affected Citroën C5 X7 vehicles to restore correct antenna-to-radio impedance and reception quality.