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.

High-quality transponder antenna designed to read and transmit the key chip signal to the immobilizer system in Citroën, Peugeot and related Stellantis models. This unit is commonly sought by part number (9663123380 / 616097 / 6160C1) and is ideal for professional workshops and DIY mechanics who need a reliable replacement part for vehicles fitted with a multiplexed body network. The antenna ensures stable recognition of the key transponder, preventing false immobilizer faults and start problems when functioning correctly.

Technical Information

• Manufacturer: Stellantis
• Model(s): Citroën Berlingo III (K9), Citroën C3 II/III, Citroën C4 I/II, C4 Picasso / C4 Grand Picasso, Citroën C5 X7, C‑Elysée, DS3, 207, 308 I, 407, Expert III; Peugeot 3008 I, Peugeot 5008 I, Peugeot Rifter; Opel Combo E (K9)
• Product Codes: 9663123380, 616097, 6160C1
• Additional Numbers: 6160.C1

Function And Symptoms

The transponder antenna surrounds the ignition barrel or is mounted on the steering column area and reads the RFID chip inside the vehicle key. It transmits the transponder code to the immobilizer control unit (BCM/BSI). If the antenna fails or has poor contact, common symptoms include intermittent recognition of the key, immobilizer warning lights, or engine crank without start.

Installation Recommendation

Disconnect The Battery Before Starting Work And Follow Manufacturer Procedures To Avoid Damage Or Airbag Deployment. Basic Replacement Steps: remove steering column trim to access the antenna, disconnect the electrical connector, remove the old antenna and fit the new unit in the same position ensuring correct alignment around the ignition barrel, reconnect the connector and reassemble trims. After replacement, verify that the key is recognized and the engine starts normally.

Important: In some cases the immobilizer system may require initialization or coding after replacement. This operation is typically performed with PSA diagnostic equipment (DiagBox/Lexia) by a technician when needed.

Why This Part Fails Most Often

Typical Causes Of Failure Include Mechanical Damage During Steering Column Service, Connector Corrosion Or Broken Wiring, Wear From Long-Term Use, Or Water Ingress. Faults Can Also Occur After Steering Column Impacts Or Improper Disassembly/Reassembly Of Trim Pieces.

Notes For Buyers

Often Searched By Part Number: 9663123380, 616097, 6160C1. Suitable For Multiple Citroën, Peugeot And Related Stellantis Models Listed Above. Designed For Installation By Professional Mechanics Or Experienced DIY Enthusiasts Comfortable With Steering Column Work.