What are the common causes of electronic malfunctions in the Audi 80?

I recently bought an Audi 80 and have been experiencing some issues with the electronic systems. Can anyone explain what could be causing these malfunctions and how to troubleshoot them?

The most common cause of electronic malfunctions in the Audi 80 is a faulty electronic control unit (ECU). It is responsible for controlling various systems such as the engine, transmission, and brake systems.

Another common cause is a loose or corroded wiring connection. This can happen over time due to wear and tear or exposure to harsh weather conditions. It's important to regularly check and clean the wiring connections to prevent malfunctions.