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.

This transponder antenna (immobilizer antenna ring) is a direct-fit replacement commonly referenced under part numbers 9663123380, 616097 and 6160C1. It restores reliable communication between the vehicle immobilizer and the transponder in the key, allowing the engine to start. Designed for use on Citroën and Peugeot vehicles with multiplexed electronics, this unit is aimed at professional technicians and experienced DIYers who search by product code when sourcing replacement parts.

Technical Information

• Manufacturer: Stellantis / Citroën / Peugeot
• Model: Compatible with a range of Citroën and Peugeot models (see list below)
• Product Codes: 9663123380, 616097, 6160C1, 6160.C1
• Other Numbers: 6160.C1 | 616097 | 6160C1 | 9663123380
• Function: Immobilizer Transponder Antenna (Antenna Ring)
• Typical Operating Frequency: LF ~125 kHz (standard for key transponder communication)
• Network Type: Vehicles with Multiplex (CAN) Electrical Architecture

Compatible Models (examples)

Citroën: C3 III, C4, C4 II, C4 Picasso, C4 Grand Picasso, C5 X7, C-Elysée, Berlingo III, DS3, 207, 308 I, 407. Peugeot: 3008 I, 5008 I, and other Stellantis models using the listed part numbers. Always refer to the vehicle’s parts list or the part number when selecting the correct unit.

Installation And Recommendations

• Disconnect Battery: Always disconnect the negative battery terminal before starting work to avoid short circuits and to protect vehicle electronics.
• Access: Remove steering column trim or ignition surround to access the antenna ring mounted around the ignition barrel or steering column area. Be careful with airbag connectors and trim clips.
• Disconnect: Unplug the antenna connector from the wiring harness. Inspect the connector and wiring for corrosion or damage.
• Swap: Remove the old antenna ring and fit the replacement in the correct orientation. Ensure the antenna sits flush around the ignition barrel and that connectors are fully engaged.
• Reassembly: Refit trim panels and reconnect the battery. Verify key recognition and engine start function with all vehicle keys.
• Tools: Basic hand tools and a light are usually sufficient. For vehicles with advanced immobilizer systems, a diagnostic tool may be required to verify key recognition and body computer status.

Why This Part Fails Most Often

• Mechanical Damage: Cracks or deformation from impact or rough removal/installation.
• Connector Corrosion or Wiring Faults: Moisture ingress or chafed wires cause loss of signal.
• Wear And Age: Coil breakage or degraded internal connections after many years in service.
• Intermittent Contact: Poor seating around the ignition barrel can reduce read range and cause key recognition issues.
• Aftermarket Keys Or Damage To Transponder: Sometimes misdiagnosed as antenna failure; always confirm key functionality.

Practical Tips For Diagnostics

If The Vehicle Does Not Recognize The Key After Replacement: Inspect Wiring And Connectors First. Check That The Antenna Is Seated Correctly Around The Ignition Barrel. Test With A Known-Good Key If Available. If Problems Persist, Scan For Immobilizer Or Body Computer Faults Using A Suitable Diagnostic Tool.

Search And Identification

This part is frequently searched by part numbers: 9663123380, 616097, 6160C1. Use These Numbers When Ordering To Speed Up Identification.

Additional Notes

Intended For Use By Automechanics And Skilled DIYers. If You Are Working On A Vehicle With Complex Immobilizer Or Body Computer Configurations, Allow Time For Proper Access And Verification Of Key Recognition After Installation.