Description
Transponder Antenna for Immobilizer for Peugeot 107 and Citroën C1 First Generation
The Valeo transponder antenna is a direct-fit immobilizer component designed for the first-generation Peugeot 107 and Citroën C1. It reads the key transponder coil when the key is inserted into the ignition and communicates with the vehicle’s immobilizer control to authorize engine start. Commonly referenced under product codes 73678312 and 6160A0, this antenna is a frequent replacement part for vehicles showing intermittent or complete loss of key recognition.
Benefits And Application
Ideal for professional workshops and competent DIYers, this antenna restores reliable key recognition and eliminates immobilizer-related no-start conditions. Compatible with first-generation Peugeot 107 and Citroën C1 models, it is a straightforward replacement that saves diagnostic time when symptoms point to the transponder ring rather than the ECU or keys.
Technical Information
- Manufacturer: Valeo
- Model: Peugeot 107; Citroën C1 (First Generation)
- Product Codes: 73678312, 6160A0
- Other Numbers: Stellantis references: Citroën / Peugeot
Function
The transponder antenna (immobilizer reader ring) surrounds the ignition barrel and detects the radio-frequency signal from the key’s transponder chip. When a valid key is detected, the immobilizer control unit permits engine start. A faulty antenna will typically present as intermittent recognition of the key, failure to start, or no immobilizer communication errors.
Replacement Procedure (Overview)
- Disconnect the battery and follow manufacturer safety procedures when working near steering and airbag components.
- Remove steering column lower and upper covers to access the ignition barrel area.
- Locate the antenna ring around the ignition barrel; unplug the electrical connector.
- Release any retaining clips or screws and remove the old antenna carefully to avoid damaging the ignition barrel or wiring harness.
- Fit the new antenna, secure clips/screws, reconnect the wiring and reassemble steering column covers.
- Test key recognition with the original key(s) and perform a full start-up test before handing the vehicle back to the customer.
Installation Recommendations
Use basic hand tools and a trim set to avoid damaging plastic covers. Ensure connector pins are clean and free of corrosion. Verify correct seating of the antenna ring around the ignition barrel—misalignment can cause weak or no signal. After installation, confirm proper operation with the vehicle’s ignition key; if the problem persists, inspect wiring to the immobilizer control unit and related fuses.
Why This Part Most Often Fails
Typical failure causes include mechanical wear and cracking of the plastic antenna housing, broken or fatigued wiring from constant steering column movement, corrosion or water ingress into the connector, and damage from previous steering column work. Electrical interference or faults in the connector pins can also lead to intermittent key recognition.
Keywords For Search
Transponder Antenna, Immobilizer Antenna, Peugeot 107 Transponder, Citroën C1 Immobilizer, Valeo 73678312, 6160A0, Immobilizer Reader Ring
