Audi A6 Quattro rear brake light malfunction despite bulb replacement on Audi A6 Quattro

Some Audi A6 Quattro owners report experiencing rear brake light malfunctions even after replacing the bulb, often due to several underlying issues. These owners may find that there is no power supply reaching the bulbs when the brake pedal is pressed, indicating potential electrical problems. Additionally, improper bulb installation can lead to connectivity issues, as a bulb may not be correctly seated. Corrosion in the connectors is another common issue that can disrupt the electrical connection, and cleaning these connectors with a suitable contact cleaner may be necessary. In some cases, owners have found that replacing the entire light unit is required to effectively resolve intermittent brake light warnings. Furthermore, some owners notice that these issues can arise after heavy rain, suggesting that water ingress may be affecting the electrical components. Addressing these factors promptly can help prevent future malfunctions.