Description
Transponder antenna for the immobilizer on Citroën and Peugeot vehicles with a multiplexed network.
This transponder antenna (part numbers 9641551180 / 616076) is an OEM-fit replacement designed for reliable communication between the vehicle immobilizer and the key transponder. Ideal for professional workshops and experienced DIYers, the unit restores correct immobilizer detection, eliminating no-start conditions caused by a faulty antenna. Compatible with a range of Citroën and Peugeot models that use a multiplexed (CAN/multiplex) network, this part is often searched by its product code — include the reference numbers when ordering to ensure a fast match.
Technical Information
- Manufacturer: Stellantis (Citroën, Peugeot)
- Model: 206, 206+, 207, 308 I, 407, Berlingo III, C‑Elysée, C3 II, DS3, C4 I, C4 Picasso, C4 Grand Picasso, C5 (X7), Expert III, Xsara, Xsara Picasso
- Product Codes: 9641551180, 616076
- Additional Numbers: Not specified
Features And Function
The transponder antenna is a passive coil or antenna ring mounted close to the ignition barrel/steering column. Its primary function is to detect the secure key’s transponder and relay that signal to the immobilizer control unit. When the key is recognized, the immobilizer allows engine start. A correctly functioning antenna is critical to prevent immobilizer-related no-starts and intermittent recognition faults.
Common Failure Causes
- Physical Damage: Broken or crushed antenna in collisions or during steering column work.
- Connector/Cabling Faults: Loose, corroded, or damaged connectors and wiring harnesses causing intermittent signal loss.
- Moisture Ingress: Water or condensation reaching the antenna assembly leading to corrosion or short circuits.
- Wear And Fatigue: Insulation degradation or broken windings in the antenna coil over time.
- Electrical Interference: Aftermarket accessories or repairs that alter grounding or create interference on the multiplex bus.
Replacement And Installation
Recommendation: Suitable for experienced mechanics and competent DIYers. Follow these general steps:
- Disconnect Battery: Always disconnect the negative battery terminal before starting to avoid short circuits and protect electronic modules.
- Access Antenna: Remove steering column covers and trim to access the antenna around the ignition barrel or steering lock area.
- Disconnect Carefully: Unplug the antenna connector and note routing of the cable to prevent pinching when reassembling.
- Fit New Antenna: Position the replacement antenna exactly as the original, ensuring the antenna ring is aligned concentrically with the ignition barrel.
- Reassemble And Test: Reconnect the battery, reassemble trims, and test with the vehicle key(s) to confirm correct transponder recognition and engine start.
In most cases the antenna itself does not require coding. If immobilizer faults persist after replacement, diagnostic equipment may be needed to read fault codes and verify communication with the immobilizer control module.
Why This Part
Using the correct part numbers (9641551180 / 616076) ensures an exact mechanical fit and correct signal characteristics for reliable key recognition. This replacement provides a cost-effective way to resolve immobilizer-related starting issues without replacing higher-cost control modules.
Installation Advice
- Handle The Antenna With Care: The antenna coil is delicate; avoid bending or crushing the ring.
- Protect Wiring: Ensure connectors are seated and routed clear of moving parts and the steering column mechanism.
- Test With Original Keys: Always test using the vehicle’s existing programmed keys after installation.
- Professional Help: If uncertain about access or if immobilizer faults persist, consult a technician with PSA diagnostic tools.
