How a car works

All partsBMW M4 CSLElectrical system › Horn

Horn

Part of Electrical system · about $90 to replace

What it is

Twin-tone electric horns behind the bumper.

What it does

Warns other road users.

How it fails

Corroded terminals; check the relay first.

MaterialSteel diaphragm, copper coil
Spec110 dB
400/500 Hz
Horn highlighted on the car

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