Description
Immobilizer Transponder Antenna For Citroën And Peugeot Vehicles. For Vehicles With A Multiplex Network.
The immobilizer transponder antenna is a direct-fit replacement component designed to read the radio-frequency chip inside vehicle keys and transmit the transponder signal to the immobilizer system. This antenna restores secure key recognition and is suitable for Citroën and Peugeot models fitted with a multiplexed vehicle network. Ideal for professional workshops and competent DIY mechanics who search by part number (9649781080 / 616097 / 6160C1).
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Immobilizer Transponder Antenna
- Product Codes: 9649781080, 616097, 6160C1
- Additional Numbers: 616097 | 6160C1 | 9649781080
Compatibility
Commonly fitted to a range of Citroën and Peugeot models with a multiplex network, including (but not limited to): Citroën C4, Citroën C4 Picasso, Citroën C4 Grand Picasso, Citroën C3 II, Citroën C‑Elysée, Citroën Berlingo III, Peugeot 207, Peugeot 308 I, Peugeot 407, Peugeot Expert III, C5 (X7) and DS3. Always check the vehicle’s part number match when ordering.
Installation Recommendations
- Disconnect the negative battery terminal before starting work to avoid short circuits and protect vehicle electronics.
- Remove the lower and upper steering column trim to access the antenna ring around the ignition barrel or steering column tube.
- Unplug the electrical connector, release any retaining clips, and remove the old antenna carefully to avoid damaging the ignition lock or surrounding wiring.
- Fit the new antenna in the same orientation, secure clips and connectors, then reassemble trims.
- After installation, verify that the immobilizer recognises the transponder key. In some vehicles key learning or immobilizer synchronization may be required using a compatible diagnostic tool (dealer or workshop-level equipment).
- Follow manufacturer procedures for removal/installation and torque settings where applicable.
Why This Part Fails Most Often
- Physical Damage: Impact from accidents or steering-column work can crack the antenna ring or break mounting clips.
- Connector Corrosion Or Poor Contact: Moisture ingress or loose connectors cause intermittent or permanent signal loss.
- Wear From Repeated Steering/Lock Movement: Mechanical abrasion or stress over time can degrade the antenna assembly.
- Electrical Faults Or Short Circuits: Wiring damage, previous incorrect repairs, or aftermarket installations can disrupt signal transmission.
- Interference Or Faulty Key Transponder: Rarely, the issue is the key; however, technicians should confirm antenna function when diagnosing no-start or key-not-detected faults.
Practical Tips For Mechanics And DIYers
- Inspect connectors and wiring harness for corrosion or play before replacing the antenna; sometimes cleaning or re-seating the connector restores functionality.
- Keep the new antenna free of grease and debris during installation to ensure reliable RF coupling with the key transponder.
- When replacing after a crash, check adjacent components (ignition switch, steering column mounts) for damage that could affect the new unit.
- If key recognition remains an issue after a correct mechanical replacement, plan for immobilizer diagnostics and key learning with appropriate PSA diagnostic tools.
Quality transponder antennas with correct OE part numbers ensure faster troubleshooting and reliable restoration of key detection and vehicle start functions — an essential spare for workshops servicing Citroën and Peugeot vehicles.
