What is the construction and purpose of horns?

Horns are electric signal elements mounted in a car, most often in the front part of the body. A typical horn consists of a housing, a diaphragm, working contacts, a bracket, and an electrical connector. Its task is to generate a clear acoustic signal when the driver presses the button. Depending on the vehicle version, it may appear as a single signal or a set of two tones.

What are horns used for?

Horns are used to warn other road users and transmit a short acoustic signal in traffic situations. A functional sound signal system increases safety because it allows for a quick reaction when a light signal or the vehicle's presence alone is insufficient. This component works with the steering wheel button, relay, and fuse, so its operation also depends on the state of the electrical system. A malfunction may mean either a failure of the horn itself or a problem in the control circuit.

What is the construction and function of a horn mount?

A horn mount is an element connecting the sound signal to the vehicle structure at a designated mounting point. It serves to stably seat the housing, limit vibrations, and maintain the correct position relative to covers and wires. In practice, its shape, mounting hole, and bracket length may differ depending on the car model. A damaged or corroded mount can cause looseness, noise, and problems with proper part installation.

How to select a horn for a specific car?

It is safest to compare the OEM part number, interchangeable numbers, connector type, and mounting method. It is also worth checking whether the car has a single-tone or dual-tone system and whether the part fits the pre-facelift or post-facelift version. If horns appear in pairs, it is good to also verify the mounting side and the completeness of the brackets.

What symptoms indicate a problem with the horn or installation?

The most common symptoms are no reaction after pressing the button, a quiet signal, intermittent operation, or a distorted tone. Such symptoms may result from a damaged diaphragm, connector corrosion, a broken wire, or a faulty relay. In diagnostics, it is also worth checking the fuse and the condition of the ground point.

How to take care of horns after installation?

After installation, it is worth periodically checking the cleanliness of the housing, the condition of the plug, and the security of the mounting. A horn operating in a zone exposed to water and dirt should be checked during front-end inspections and after body repairs. A quick reaction to a weakening signal allows you to avoid further damage to contacts and brackets.

Horns

At the Global Parts automotive store, we offer a wide selection of original used car parts, including horns for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen and others. The horns we offer undergo quality control so that you can be sure that you are receiving a top-class product.

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Mercedes CLK W209 Horn Signal Fanfare Low Tone Siren Pitch A0055428020

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Part no. A0055426620-1

Horn Signal Mercedes W203 W219 W229 Fanfare High Tone Siren A0055426620

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Part no. A2535421700

Mercedes GLC X253 High Tone Horn Siren A2535421700

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Part no. A0075427020

Mercedes W212 Front Horn Signal Fanfare 420Hz Right O/S A0075427020

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Part no. A0075427620

Horn Signal Mercedes W117 W176 W246 Fanfare Siren Left N/S A0075427620

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Part no. A2239005936

Mercedes CL C118 W177 Anti Theft Alarm Siren Horn Signal Fanfare A2239005936

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Part no. a0075426020

Mercedes SLK R172 Horn Signal Right O/S Fanfare 400Hz A0075426020

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Part no. A0055426720

Mercedes S211 W211 Tone Horn Signal Woofer 420Hz Left N/S A0055426720

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Part no. A2045456740-2

Mercedes W204 Anti-Theft Alarm Siren Horn Signal Bracket Holder A2045456740

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Part no. A0065428320

Mercedes W221 Horn Signal Alarm Siren High Pitch Tone 520Hz Left N/S A0065428320

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Part no. A2045456740-1

Mercedes W204 Anti-Theft Alarm Siren Horn Signal Bracket Holder A2045456740

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Part no. A0005424204

Mercedes W166 Horn Warning Alarm Siren A0005424204

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Part no. A0065424420-1

Mercedes W245 Horn Signal Low Tone Fanfare Bosch 500Hz A0065424420

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Part no. A2038203826

Mercedes CLK W203 W209 Anti Theft Alarm Siren Horn Signal A2038203826

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Part no. A0065422720-1

Mercedes W245 Horn Signal Tweeter High Tone Fanfare Bosch 420Hz A0065422720

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Part no. A9065420020

Mercedes Sprinter W906 Horn Signal Fanfare Alarm Siren Pitch 500Hz A9065420020

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Part no. A0055427920

Horn Signal Mercedes W204 W212 Fanfare Sound Alarm High Tone Siren A0055427920

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Part no. A2075421720

Mercedes C207 Coupe Horn Signal Fanfare 420Hz Front Right O/S A2075421720

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Part no. A4615420020

Mercedes W203 S203 CL203 W463 Horn Signal Fanfare Left N/S A4615420020

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Part no. A0065421220

Mercedes W169 W202 W203 W220 Horn Signal Fanfare A0065421220

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Part no. A9065400076

Mercedes-Benz Sprinter W906 Horn Signal Fanfare A9065400076

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Part no. A0065421220-3

Mercedes W169 W202 W203 W220 Horn Signal Fanfare A0065421220

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Part no. A2055420820

Mercedes W205 High Low Tone Pitch Horn Signal Alarm Siren Fanfare A2055420820

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Part no. A0065421520

Mercedes W204 W212 Horn Signal Fanfare A0065421520

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Part no. A2038203826-1

Mercedes-Benz C CLK W203 W209 1 Anti-Theft Alarm Siren Horn Signal A2038203826

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Part no. A0005428904

Mercedes SLK R172 Roadster Front Right O/S Horn Signal 420 Hz A0005428904

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Part no. A0045428720

Horn Mercedes W210 Horn Signal Fanfare Low Tone 400Hz A0045428720

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Part no. A0075425320

Mercedes GLE C292 ML W166 Horn Tweeter Horn Signal 510Hz Fanfare A0075425320

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Part no. A0045429020

Mercedes-Benz E-Class W210 Horn Signal Fanfare High Tone 500Hz A0045429020

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Part no. A0075425420

Mercedes GLE C292 ML W166 Horn Low Tone Signal 420Hz Fanfare A0075425420

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Part no. A0065420820

Mercedes W221 Fanfare 510Hz Front Left N/S Horn Sound Signal A0065420820

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Part no. A0065429820

Mercedes W176 W246 Horn Signal Fanfare Front Left Horn Signal A0065429820

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Part no. A0075421220

Mercedes V251 Front Bumper Signal Air Horn Fanfare 420Hz Left N/S A0075421220

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Part no. A0045428020

Mercedes-Benz CL S Class C215 W220 Horn Signal Fanfare Right O/S A0045428020

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Part no. A0065420120

Horn Signal Mercedes W211 W219 Fanfare 420Hz Horn Signal Siren A0065420120

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Part no. A0005428804

Mercedes SLK R172 Roadster Front Left N/S Horn Signal 510 Hz A0005428804

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Part no. A0045427820

Mercedes-Benz CLK-Class W208 Horn Signal Fanfare Low Tone 420Hz A0045427820

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Part no. A0045427920

Mercedes-Benz CLK-Class W208 Horn Signal Fanfare High Tone 510Hz A0045427920

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Part no. A0045423620

Horn Signal Mercedes W124 W202 W210 Fanfare High Tone Siren 485Hz A0045423620

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Part no. A0055426720-1

Mercedes S211 W211 Tone Horn Signal Woofer 420Hz Left N/S A0055426720

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Part no. A0055425720-1

Horn Signal Mercedes W203 W251 Right O/S Alarm Siren High Tone A0055425720

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Part no. A0065421220-2

Mercedes W169 W202 W203 W220 Horn Signal Fanfare A0065421220

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Part no. a0075425920

Mercedes SLK R172 Horn Signal Left N/S Fanfare 500Hz A0075425920

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Part no. A0065421220-1

Mercedes W169 W202 W203 W220 Horn Signal Fanfare A0065421220

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Part no. A0045427720

Mercedes W203 Horn Signal Fanfare Siren Alarm A0045427720

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Part no. A2135422800

Mercedes W213 C238 Horn Signal Alarm Siren High Tone Left N/S A2135422800

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Part no. A0005405500-1

Horn Signal Mercedes W176 W246 W156 W117 Fanfare 400Hz Left N/S A0005405500

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Part no. A0055421220

Horn Signal Mercedes W203 W209 Fanfare Low Tone Siren 400Hz A0055421220

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Part no. A0065422520

Mercedes W164 Horn Sound Signal Fanfare Alarm Left N/S A0065422520

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