my q7 2006 diesel engine is not starting and has no warnings what could b the problem before this it was starting after 3 or 4 trials
Well, check your Battery make sure the voltage is good and the Load test is good. Then, I would listen for a click if the battery is good and it is clicking then it is the starter.
If you can't find a starter then I would try a good reputed starter rebuilder.
Search Audi Q7 Questions
Audi Q7 Experts
Related Models For Sale