Horn, Low/High-Pitched. Porsche 911 / 928 / 964 / 993 › 91163510

The OE Match low/high-pitched horn is a replacement warning-sound component, match the required tone and original reference before selecting a replacement.

Fits

• Porsche 911 1970-89 
• Porsche 928 1978-86 
• Porsche 964 1989-94 
• Porsche 993 1994-98
  
  Check fitment for your specific vehicle (model, year, engine) before ordering.
  
  Diagram ref no 7
  
  What Is This Part?

This is an electric fanfare horn, forming the sound-producing part of the vehicle's horn system. An electrically driven diaphragm produces the warning note when the horn circuit is activated. High- and low-pitched horns provide the separate notes in a dual-tone installation, so a failed unit can change the overall sound even when the other horn still operates. The horn works with the vehicle's wiring, switching circuit and mounting support; these should be checked when investigating a fault.

What Does This Part Do?

• Produces an audible warning: Converts electrical activation into the horn's warning sound.
• Provides the required note: Supplies the high- or low-pitched sound appropriate to the selected version.
• Works within the horn assembly: Operates alongside the companion horn where a dual-tone arrangement is fitted.
  
  Why Replace This Part?

Replacement may be appropriate if the horn remains silent, weak or distorted after its electrical supply and connections have been checked. Moisture, corrosion or deterioration within the sound-producing mechanism can affect operation. A damaged housing or mounting attachment may also make the existing horn unsuitable for refitting.

Do not assume that silence means the horn itself has failed. A fuse, relay, steering-wheel switch, damaged wire or poor earth connection can produce similar symptoms. Establishing the cause first helps avoid replacing a serviceable component.

When to Replace This Part?

• No sound: The horn does not operate despite a verified supply and earth connection.
• Weak or distorted note: The sound remains croaky or muted after connection faults have been ruled out.
• Missing note: Only one horn operates in a dual-tone installation.
• Intermittent operation: Testing identifies the horn rather than its wiring or controls as the source.
• Physical damage: The housing, terminals or mounting attachment are damaged or substantially corroded.
  
  Where Is This Part Fitted?

Location: At the vehicle's horn mounting assembly, secured to its support and connected to the horn wiring. The mounting arrangement varies by model, so compare the existing support, connections and horn orientation before fitting.

Technical Details

• Type: Electrically operated fanfare horn with low- and high-pitched versions.
• Standard application identification: Reference 91163510121 is listed as short/high-pitched; reference 91163510221 is listed as long/low-pitched.
  
  FAQs

• Could the fault be in the horn switch or relay? Yes. Check circuit activation, the electrical supply, connectors and earth path before replacing the horn.
• Does a weak sound always mean the horn needs replacing? No. Poor connections or a low supply voltage can also weaken the sound. Clean and test the connections before condemning the horn.
• How should I choose between the tones? Compare the original reference and identify which note is missing or faulty. Check the special application note where relevant.
  
  
  Product Summary

• Product: Low/high-pitched electric fanfare horn.
• Brand: OE Match.