Description
Horn (siren) for Citroën C4 first generation. Includes bracket for body mounting.
Robust replacement horn intended for Citroën C4 (first generation). This unit comes with a body mounting bracket for straightforward installation and uses the OE product code 6236G4. Designed for professional garages and experienced DIYers, the horn delivers a clear, powerful tone to meet road-safety requirements and restore proper audible signaling. Ideal when the original horn has failed due to corrosion, electrical faults or mechanical wear.
Technical Information
- Manufacturer: Citroën / Stellantis
- Model: Citroën C4 (First Generation)
- Product Codes: 6236G4
- Other Numbers: —
Function
The horn (klaxon) is an electromechanical device that converts electrical energy into an audible warning signal. Activated via the steering wheel horn contact, it relies on a dedicated relay and fuse in the vehicle electrical system to deliver nominal voltage and current for reliable operation.
How To Replace
- Disconnect the negative battery terminal before starting work.
- Locate the horn in the engine bay or behind the front bumper (position depends on model year and trim).
- Remove the electrical connector and any retaining clips or screws holding the horn to the bracket.
- Unbolt the old horn from its bracket and transfer the bracket if required; fit the new horn with the supplied mounting bracket.
- Reconnect the electrical connector, secure all fixings, reconnect the battery and test the horn.
- If the horn does not sound, check the fuse, relay and wiring continuity before replacing again.
Installation Recommendations
- Always disconnect the battery before removal or installation to avoid short circuits.
- Clean the mounting area and electrical connector to ensure good contact and reduce risk of future corrosion.
- Tighten mounting bolts to vehicle manufacturer torque where specified; avoid over-tightening plastic clips.
- Verify the horn operation after installation and check for any water ingress points near the mounting location.
- If uncertain about access or electrical diagnosis, have the replacement performed by a qualified technician.
Why This Part Typically Fails
- Corrosion and Water Ingress: Exposure to moisture and road salt can corrode terminals and diaphragms, causing loss of sound or intermittent operation.
- Electrical Issues: Blown fuse, failed relay or damaged wiring/connectors can prevent the horn from receiving power.
- Mechanical Wear: Internal contacts and diaphragms can wear out over many years of use, leading to reduced volume or no sound.
- Impact Damage: Front-end impacts or improper repairs can bend the bracket or damage the horn mounting.
Compatibility And Notes
Primarily compatible with Citroën C4 first generation (approx. model years 2004–2010). Confirm fitment by comparing the OE code 6236G4 and mounting style with the existing unit. The bracket supplied matches body mounting locations used on original installations for this model range.
Supplied as a direct-replacement horn complete with mounting bracket for quick fitting. Suitable for workshops and capable DIY installers looking for a reliable, OEM-code-matching solution.
