Hella 011225831 Horn

Hella 011225831 Horn Kit Overview

The Hella 011225831 horn kit is a 12V universal trumpet-style horn built for vehicles that use a dual-tone horn setup. With a 500 Hz frequency range and 144 W power consumption, it delivers a clear, direct alert tone for everyday driving and replacement needs. This Hella horn is a practical choice for BMW 228i, 328i, 435i, M3, and M4 applications listed below.

• 12V universal horn kit for body and horn replacement applications
• 500 Hz frequency range for a distinct trumpet-style tone
• 144 W power consumption
• Direct replacement reference for multiple OE and aftermarket part numbers
• Fits select BMW high-tone and low-tone horn positions

Detailed Product Description

Built under the Hella brand, part number 011225831 is a universal horn kit intended for vehicles that require a 12V trumpet horn with a 500 Hz output. The listed fitment includes BMW models such as the 2014-2016 BMW 428i, 2014-2016 BMW 435i, 2015-2016 BMW M3, and 2016 BMW M4, along with additional 2 Series, 3 Series, and 4 Series applications. This part number 011225831 also cross-references Standard Ignition HN35 for the same application.

Compatible With select BMW horn applications, this Hella horn supports both high-tone and low-tone positions depending on the vehicle listing. It is a straightforward replacement option when restoring factory-style horn function on BMW 230i, 228i xDrive, 335i GT xDrive, and related models.

What This Horn Helps Address

• Weak or inconsistent horn output
• Failed high-tone or low-tone horn operation
• Horn replacement after electrical or corrosion-related failure
• Restoring audible warning function on BMW horn circuits
• Replacing a worn OE-style trumpet horn assembly

Installation Notes and Tips

Verify the vehicle’s horn position and tone requirement before installation, since the fitment list includes both high-tone and low-tone applications. Confirm 12V system compatibility and match the replacement to the original horn location. Review the vehicle-specific connector and mounting arrangement before beginning service. For BMW applications, use the fitment list to confirm the exact year, model, and horn tone.

Quality Assurance

Hella is a recognized automotive electrical and lighting brand with broad OE and aftermarket coverage. Part number 011225831 is listed with multiple interchange references, including OE-style and aftermarket numbers, to support accurate replacement selection.