Description
Antenna impedance module, impedance adapter for PEUGEOT 307 CC vehicles.
Product Overview
This antenna impedance module (antenna adapter) is designed for Peugeot 307 CC models and is commonly referenced by part numbers 9655796780, 6561CV and 6561R5. It ensures correct impedance matching between the vehicle antenna and the radio head unit, improving FM/AM reception and preventing signal loss or distortion. Frequently searched by its codes, this compact electronic module is a standard replacement part for vehicles with factory-installed radio systems.
Technical Information
- Manufacturer: Stellantis (Peugeot/Citroën)
- Model: Peugeot 307 CC
- Product Codes: 9655796780, 6561CV, 6561R5
- Additional Numbers: 6561R5
Function
The module provides impedance matching between the vehicle antenna and the radio to ensure optimal RF transfer and minimise reflected signals. Proper impedance matching results in clearer reception, reduced noise, and improved sensitivity across AM and FM bands. In some vehicle variants, the module may also include basic amplification or filtering stages to stabilise signal level.
Compatibility
Intended for Peugeot 307 CC vehicles that use the referenced product codes. Always verify the part number on the old module before ordering to ensure correct fitment. This part is typically used with the factory radio and aerial assembly installed from the factory.
Symptoms Of A Faulty Module
- Poor or intermittent radio reception (weak stations, dropouts, or heavy noise)
- Significant difference in reception quality between left/right or front/rear channels
- No AM/FM signal despite a functioning head unit
- Visible corrosion or water damage at the module or antenna base
Common Causes Of Failure
Failures are usually caused by environmental and mechanical factors rather than wear-out: water ingress at the antenna base or module, connector corrosion, damaged or crushed coaxial cables, lightning strikes or transient electrical events, and mechanical damage during bodywork or roof operation on convertible models. Poor grounding or a failed antenna mast can also overload the module and lead to malfunction.
Replacement And Installation
Replacement is straightforward for experienced technicians and competent DIYers. Typical procedure:
- Disconnect the vehicle battery before starting work to prevent short circuits and protect electronics.
- Access the antenna module location (often near the antenna base or inside the rear trim/boot area on the 307 CC). Remove interior panels as needed, keeping fasteners organised.
- Carefully disconnect the antenna coaxial connector(s) and any multi-pin plugs. Inspect connectors and wiring for corrosion or damage.
- Fit the replacement module, reconnect connectors, and secure the unit in its mounting. Reassemble trim panels.
- Restore battery power and test radio reception thoroughly before completing reassembly.
Installation Recommendations
- Inspect the entire antenna coaxial cable and connectors; replace damaged or corroded cables to avoid repeating the failure.
- Clean and protect electrical contacts; use dielectric grease on coaxial connectors to reduce future corrosion.
- Ensure good chassis grounding of the antenna base and related components.
- Test reception and check for noise or dropouts with the roof closed and open (for convertibles) to confirm stable performance.
Why The Part Most Often Fails
The most frequent cause is water penetration and subsequent corrosion at the antenna base or connectors, especially on convertibles where seals can degrade. Mechanical damage when removing or reinstalling trim, or deterioration of the coaxial cable insulation, also commonly lead to module failure. Addressing the root cause (seals, cable condition, grounding) during replacement helps prevent repeat faults.
Search Tips
Customers often locate this part by part numbers: 9655796780, 6561CV, 6561R5 or by searching for “Peugeot 307 CC antenna module” and “antenna impedance adapter.” Including these codes in your search will speed up finding the correct replacement.
