I have a 2016 Audi A-3. I want to have the navigation system updated. The Bellevue dealer said it would cost over $300. Is there a reliable way to have this done at lower cost?

If you are brave you can do it for $100. Check the audi world forums.

I never had update the navigation on my 2015 Audi Q5, So I don't know, sorry, but you can check with Seattle Audi and might be cheaper, because last April I called Bellevue Audi for full maintenance, then they charge $1100, but Seattle Audi only $600,

Check Audi seattle.