What are the common issues with the Audi A2's ABS system?

I've been experiencing some strange vibrations when braking in my Audi A2. I suspect it might be a problem with the ABS system. Can anyone help me identify the most common issues with this system and how I can fix them?

The most common issue with the Audi A2's ABS system is a faulty speed sensor. This can cause vibrations when braking and can be easily fixed by replacing the sensor. My advice is to take your car to a trusted mechanic and have them check the sensor.

Another common problem is air bubbles in the brake lines. This can also cause vibrations and can be fixed by bleeding the brakes. My recommendation would be to follow the official Audi A2 service manual or take it to a certified Audi dealership for a thorough brake fluid flush.

Sometimes, the ABS module can fail due to water damage or wear and tear. In this case, it will need to be replaced, which can be quite expensive. My advice would be to regularly check and clean the drainage holes under the windshield to prevent water from reaching the module.