Description
Transponder Antenna For Immobilizer For Peugeot And Citroën Vehicles
This Valeo transponder antenna is a direct-fit immobilizer reader used on a number of Citroën and Peugeot vehicles. Designed for professional workshops and experienced DIYers, this antenna reads the key transponder signal at the ignition, allowing the vehicle’s immobilizer to recognise authorised keys and enable engine start. It is a common replacement part when the vehicle shows immobilizer faults or fails to recognise the key.
Key Features And Benefits
– Reliable OEM-Level Signal Readability: Designed to read factory transponder chips accurately, reducing no-start faults caused by poor reception.
– Easy Replacement Without Major Disassembly: Located around the ignition barrel, it can usually be replaced with basic tools and steering column trim removal.
– Genuine Valeo Design: Matches original mounting and electrical connector layout for straightforward swap-in replacement.
Where It Is Located And What It Does
The transponder antenna is mounted around the ignition barrel inside the steering column shroud. Its job is to pick up the low-frequency signal from the key transponder when the key is inserted or turned, then pass that signal to the vehicle’s immobilizer unit. If the immobilizer does not receive a proper transponder code, the engine will be prevented from starting.
Installation Recommendations
- Always Disconnect The Battery Before Starting Work To Avoid Short Circuits Or Damage To Electronic Modules.
- Remove Steering Column Trim Panels Carefully To Access The Antenna; Use Trim Tools To Avoid Breaking Clips.
- Unplug The Electrical Connector And Remove Mounting Screws/Clips Holding The Antenna In Place.
- Install The New Antenna In The Same Orientation As The Old Unit. Ensure The Coil Sits Flush Around The Ignition Barrel Without Pinching Wiring.
- After Fitment, Verify Key Recognition With A Known Good Key. If Immobilizer Faults Persist, Use A PSA Diagnostic Tool To Read And Clear Fault Codes.
Why This Part Most Often Fails
- Connector Or Wiring Damage: Repeated steering column movements, corrosion, or accidental pinching during repairs can break the antenna wiring or degrade the connector contact.
- Physical Damage During Steering Column Service: Removal/installation of the steering lock or ignition switch can damage the antenna coil or its mounting.
- Moisture Or Corrosion: Water ingress or long-term humidity can corrode contacts and reduce signal pickup.
- Interference Or Misalignment: Incorrect seating around the ignition barrel or nearby metal deformation can weaken the transponder signal.
Technical Information
- Manufacturer: Valeo
- Model: Citroën Xsara; Citroën Xsara Picasso (used On Selected Peugeot And Citroën Vehicles)
- Product Codes: 9634051880; 73656312; 616071
- Other Numbers: 616071 | 73656312 | 9634051880
Troubleshooting Tips
If The Vehicle Does Not Recognise The Key After Replacement: Recheck Connector Pins And Wiring Continuity; Confirm Antenna Is Properly Seated Around Ignition Barrel; Test With A Known Working Key; Read Fault Codes With A Diagnostic Tool And Clear Stored Immobilizer Errors.
Who Should Fit This Part
Recommended For Experienced DIYers And Professional Mechanics. If You Are Uncertain About Disassembly Of The Steering Column Or Immobilizer Diagnosis, Seek A Workshop With PSA Diagnostic Equipment.
