I have a 93 A90 Quattro my driver seat heater is out what can i do.
Hi sweetride! My suggestion would be to talk to a parts guy or service guy at your local Audi dealer. There could a simple and easy fix for a part that is often replaced. or the job could be more complicated. In either event talking to someone who knows the system well will give you the clearest picture of what needs to be done and how much it will cost. Then you can make a sound decision about the job. Good luck!
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