Description
AMiO 04077 Horn | 12-24V | 520mm | Chromed | Ships Today
The AMiO 04077 horn delivers powerful audible warning across both 12V and 24V electrical systems. With a 520mm overall length and chromed finish, this horn combines functionality with classic styling. The dual voltage capability makes it suitable for light commercial vehicles (12V) and heavy goods vehicles (24V) alike. At £42.49, the AMiO 04077 horn is a practical replacement for damaged or non-functioning original equipment horns.
What Is the AMiO 04077 Horn?
The Role of a Horn on a Commercial Vehicle
A horn is a mandatory safety component on every vehicle used on UK and EU roads. It provides an audible warning to other road users in potentially hazardous situations. According to UK Government vehicle regulations, horns must produce a continuous, uniform sound and are tested during annual commercial vehicle inspections.
What This Horn Includes
The AMiO 04077 horn features a single trumpet design with 520mm total length. The chromed surface provides corrosion resistance and a polished appearance suitable for exposed mounting positions. Dual voltage operation (12-24V) means the same horn works on mixed fleets without requiring different inventory. The AMiO 04077 horn uses electromagnetic operation with no external air supply needed.
For technical information on commercial vehicle audible warning devices, refer to Bosch automotive electrical systems.
Full Specifications
| Specification | Detail |
|---|---|
| Item Number | 04077 |
| Manufacturer | AMiO |
| Voltage | 12-24V |
| Length | 520 mm |
| Surface | Chromed |
| Condition | New |
| EAN | 5903293040775 |
| Trade Number | AMIO 04077 |
Vehicle Compatibility
Confirming Fitment
The AMiO 04077 horn fits any 12V or 24V vehicle requiring a single trumpet horn. Before ordering, confirm:
Your vehicle uses a 12V or 24V electrical system — this horn works with both. The mounting location provides sufficient space for the 520mm horn length. Your vehicle’s horn circuit can supply the required current at your system voltage.
If uncertain about fitment of the AMiO 04077 horn, our parts team can assist before you order.
Cross-Reference
| Reference | Number |
|---|---|
| AMiO Part Number | 04077 |
| Voltage Range | 12-24V |
| Length | 520 mm |
| Finish | Chromed |
When to Replace Your Horn
Signs the Horn Needs Replacing
Watch for these indicators:
No sound – Press the button and nothing happens. Check the fuse and relay first. If power is present but the horn is silent, replacement is needed.
Weak or distorted sound – Reduced volume or raspy, uneven tone indicates internal failure. A new unit restores full output.
Intermittent operation – The horn works sometimes but fails at other times. This indicates internal connection failure or corrosion.
Why Choose the AMiO 04077 Horn
Dual Voltage Compatibility
The AMiO 04077 horn operates across the full 12V to 24V range. Fleet operators can stock a single part number for mixed-voltage fleets, simplifying inventory management and reducing ordering errors.
520mm Length for Strong Projection
The 520mm trumpet length provides excellent sound projection. Longer trumpets typically produce deeper, more directional sound that carries further than shorter horns.
Chromed Finish for Durability
The chromed surface provides corrosion resistance against road salt, moisture, and weather exposure. This is particularly important for externally mounted horns on commercial vehicles operating in all conditions.
Simple Electromagnetic Operation
No external air supply or compressor is needed. The AMiO 04077 horn uses standard electromagnetic operation, making it a straightforward replacement for original equipment horns.
Installation
The AMiO 04077 horn requires basic electrical knowledge for installation. The horn mounts to the vehicle chassis or existing horn bracket using standard fasteners. Connect the wiring to the existing horn circuit, observing correct polarity if required.
For vehicles with only one horn wire, ground the second terminal to the chassis. For 24V vehicles, confirm the existing horn circuit provides the correct voltage — the AMiO 04077 horn accepts both 12V and 24V without adjustment.
Always test after installation. Press the horn button and confirm strong, clear sound output.
For installation guidance, consult Mercedes-Benz truck service documentation.
Legal Requirements
All motor vehicles on UK and EU roads must carry a functioning horn. According to UK Construction and Use Regulations, horns must produce a uniform sound and not be excessively loud or discordant. HELLA vehicle horn guidelines confirm that standard electromagnetic horns meet all applicable requirements.
Frequently Asked Questions
Q: Does the AMiO 04077 horn work on 12V and 24V vehicles?
Yes. This horn operates across the full 12-24V range, covering light commercial vehicles (12V) and heavy goods vehicles (24V).
Q: How long is the 04077 horn?
520mm total length from mounting point to trumpet end.
Q: Is the 04077 horn chromed or painted?
Chromed surface finish for corrosion resistance and polished appearance.
Q: Does this horn require an external air supply?
No. The 04077 horn uses electromagnetic operation. No compressor or air tank needed.
Q: Is this a single or dual trumpet horn?
Single trumpet design with 520mm length.
Q: What is the warranty on the 04077 horn?
AMiO typically provides 12 months warranty. Keep your receipt.
Q: Does the 04077 horn ship today?
Yes. Orders before 2pm GMT ship same day.
Buy the AMiO 04077 Horn
Add to basket for same-day dispatch. Fast UK and EU delivery available. Contact our parts team for bulk orders or compatibility queries.
