catalytic converter growing worse for few thousand miles. Any danger re engine damage?? how urgent to get it fixed?? car faces inspection in Jul, '20.
What is your question?
Sounds like a hole in the muffler. Mostly from front, driver's side of car. Is it necessary to 100% replace the whole system, or just where the problem is?? Noisiest on start up; as engine idles down, noise reduces 50%.
What makes this problem better or worse?
It's worse when engine is cold; doesn't seem to affect performance; gas mileage is worse
How long has your 2009 Audi Q7 had this problem?
several months - car isn't used that much. Noise has grown worse over 2,000 mile period, or 8 months
RepairPal Certified shops can diagnose and repair your 2009 Audi Q7. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Symptoms are more indicative of a leaking EXHAUST MANIFOLD / gasket.
Recommend *hands-on* inspection / evaluation y qualified personnel.
Then you’ll know best route to take.
