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What is the function of the brake pad wear sensor in an Audi 80?

I recently noticed that my Audi 80 is displaying a warning about the brake pad wear. I am wondering what the brake pad wear sensor does and if it's a necessary component of my car's braking system.

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The brake pad wear sensor is a small electronic device that is attached to the brake pads. Its function is to monitor the thickness of the brake pads and send a signal to the car's computer when they need to be replaced.

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Without the brake pad wear sensor, it would be difficult to know when your brake pads are worn out, which could potentially lead to unsafe driving conditions. It's important to get them replaced promptly to ensure optimal braking performance.

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