Q: Car will not start on 1992 Audi 100

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How do I by pass the programmed key to start the car? The key I have to it has been broken.
(2) Answers
If I recall correctly the key remote simply locks/unlocks the doors.
No start could be the usual suspects starting with fuel pressure <relay or pump> , no spark <Hall pick up/coil> mechanical issues <timing belt> and so on.
Start with basic diagnosis........