If the car horn needs to be replaced, it is recommended to go to the repair shop to replace it. Generally, you can't change it yourself. This is more complicated. The function of car horn is as follows:

1. The function of the automobile horn is to transmit and bear the front load of the automobile, support and drive the front wheel to rotate around the kingpin, and steer the automobile. Under the running state of the automobile, it bears variable impact load, so it requires high strength;

2. The horn of the car is called "knuckle" or "knuckle arm", which is the shaft head at both ends of the I-beam in front of the car. It is a bit like a horn, so it is commonly known as "horn";

3. Steering knuckle, also called "claw", is one of the important parts of automobile steering, which can make the automobile run smoothly and transmit the driving direction sensitively.

Steering knuckle is the hinge of wheel steering, generally fork-shaped. The upper fork and the lower fork have two coaxial holes for installing the kingpin, and the steering knuckle journal is used for installing the wheel. The two ears of the pin hole on the steering knuckle are connected with the fist-shaped parts at both ends of the front axle through the kingpin, so that the front wheel can deflect around the kingpin for a certain angle, thus steering the automobile.

In order to reduce wear, the bronze bushing is pressed into the pin hole of the steering knuckle, and the lubrication of the bushing is lubricated by the grease injected from the nozzle installed on the steering knuckle. In order to make steering flexible, a bearing is installed between the lower ear of the steering knuckle and the fist-shaped part of the front axle. An adjusting washer is also installed between the upper ear of the steering knuckle and the fist-shaped part to adjust the gap between them.