Reliable FM reception starts with a high-quality antenna amplifier. This FM2 Blaupunkt antenna amplifier (part numbers 9664378080 / 6561YN) restores weak radio signals, reduces noise and improves overall audio clarity for in‑car entertainment systems in Citroën and Peugeot vehicles. Designed for professional garages and DIY mechanics, this unit is a direct-fit electrical component that helps bring back stable FM reception after antenna or amplifier failure.

Key Benefits

• Improves FM signal strength and reduces static and dropouts.
• Direct replacement part for compatible Citroën and Peugeot models—easy swap for experienced technicians.
• OEM-quality Blaupunkt electronics for consistent radio performance.

Typical Applications and Fitment

Suitable for a range of Stellantis Group vehicles. Common fitments include:

• Peugeot 3008 I
• Peugeot 5008 I
• Various Citroën and Peugeot models that use the FM2 Blaupunkt amplifier (confirm part number match before installation).

Installation Overview

Replacement is intended for trained technicians or competent DIYers with basic electrical skills. Typical installation steps:

• Disconnect the vehicle battery before starting work to avoid short circuits.
• Access the antenna amplifier—usually located in the roofliner, tailgate area or near the antenna base depending on model.
• Remove interior trim panels carefully to avoid damage to clips and upholstery.
• Unplug the amplifier electrical connector(s) and aerial connector(s).
• Replace the amplifier with the new unit and reconnect all plugs, ensuring a secure and corrosion‑free connection.
• Reassemble trims and reconnect the battery. Test FM reception and antenna grounding after installation.

Technical Information

• Manufacturer: Blaupunkt
• Model: FM2 Antenna Amplifier
• Product Codes: 9664378080, 6561YN
• Additional Numbers: Stellantis references commonly associated with the part: 9664378080 / 6561YN

Installation Recommendations

For reliable results, follow these recommendations:

• Work in a dry, well‑lit environment and use trim tools to avoid damage to interior panels.
• Inspect antenna mast, coaxial cable and connectors for corrosion or breaks—faulty cabling often causes perceived amplifier failure.
• Ensure connectors are clean and free of moisture; apply dielectric grease where appropriate to prevent future corrosion.
• After installation, verify radio reception across multiple FM frequencies and test while driving to confirm signal stability.

Why This Part Fails Most Often

Antenna amplifiers typically do not have a fixed service interval; failures are most often caused by:

• Water ingress and corrosion at connectors or the amplifier housing (common after roof or tailgate seals degrade).
• Damaged or corroded coaxial cables and antenna bases causing intermittent or no signal at the amplifier input.
• Electrical faults such as short circuits, voltage spikes or poor grounding.
• Physical damage from impact or improper handling during previous repairs.

Replacing the amplifier often restores normal FM reception, but always check the antenna system and cabling first to avoid replacing a perfectly functioning amplifier.