The Audi Wiper Arm connects the wiper linkage to the wiper blade. It is a rigid link that lets the wiper blade sweep water and light debris away to keep the driver's forward view clear. The Audi Wiper Arm is attached to a shaft, which is turned by the wiper motor worm gear that is positioned under the hood. A rotating action is converted into a controlled back and forth motion by the linkage, which this arm transfers to the rubber-tipped blade. According to Audi, a spring force located in the arm ensures that constant pressure is applied by the blade against the glass, a feature that helps the rubber edge wipe off water without scratching the glass surface. To prevent streaking that could compromise functionality, the arm must always retain a secure grip on both the drive post and the blade fitting. The reason behind this is that the arm transmits every cycle of motion to the Audi windshield glass. If a component is continuously applied in rain, snow, or sprayed washer fluid, it can eventually wear, bend, or lose tension. This may show up as uneven wiping or chatter, or the blade might not track the curvature of the glass. If the arm stops maintaining the correct pressure or does not move after the switch is pressed, visibility can be limited in bad weather. The Wiper Arm is the critical mechanical connector between power and wiping action on all Audi models in the A3 family. As a result, the A3 regularly benefits from a reliable way of clearing the screen each time it encounters rain. The Wiper Arm is a simple wiper part without any specialized wiper variant. It focuses on reliable movement transfer.
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