What is the size of Volkswagen horn rivets?
3 Answers
Volkswagen horn's original rivet size: 4.7X15mm. Typically used on wipers, at the connection point between the wiper swing arm and the wiper blade. Wiper operation principle: The power source of the wiper comes from the motor, which is the core of the entire wiper system. The quality requirements for the wiper motor are quite high. It uses a DC permanent magnet motor, and the wiper motor installed on the front windshield is generally integrated with the worm gear mechanism. The function of the worm gear mechanism is to reduce speed and increase torque. Its output shaft drives the four-bar linkage mechanism, which converts continuous rotational motion into left-right swinging motion. Basic introduction to wipers: Refers to the blade structure installed in front of the windshield, composed of the motor, reducer, four-bar linkage mechanism, wiper arm spindle, wiper blade assembly, etc. Its main function is to remove rain, snow, and dust that obstruct the view on the windshield.
When I last replaced the horn on my Volkswagen, I noticed that most of the rivets or screws were M8 size, meaning the bolt diameter was around 8mm, but don’t take it as absolute—it depends on the specific model. My Golf is an older version, and the horn mounting points used standard metric screws, typically ranging from 6mm to 10mm. You can estimate the size by measuring the hole. When installing, pay attention to the horn’s position—the inner side of the front bumper is prone to water ingress and rust, and screws that are too big or small may loosen and cause noise. I recommend keeping a caliper or tape measure handy for DIY checks, and always disconnect the battery before working for safety. A veteran at the repair shop always says Volkswagen parts lean toward standardization, but don’t force anything—over-torquing can damage the screw holes. Just keep a few M8 nuts on hand to test; if they don’t fit, try a size smaller. The Volkswagen maintenance manual also has specifications.
Having repaired Volkswagen cars for over a decade, the fasteners for horns are mostly bolts, with sizes varying case by case. For common models like Polo or Tiguan, they typically range from M6 to M10, as the standard mounting points are designed to accommodate these. Never trust a single size specification – actual measurement is crucial: the screw hole diameter, bolt head size, and thread matching are what truly matter. In daily practice, I've encountered M8 cases most frequently. If rusted, they become tougher to remove, so keep some rust penetrant handy for pre-treatment. It also depends on the horn type – single-tone and dual-tone models have different screw positions, with Volkswagen OEM parts usually adopting metric specifications. Always tighten according to specifications after installation, as horn vibrations can easily cause loosening, and that rattling noise will drive you nuts throughout your drive. Timely replacement of screws extends component lifespan and ensures passing vehicle inspections.
