Symptom: Buzzing coming from under the dash to the right of the center console, up underneath near firewall. It happens only at low rpm range when engine is under load such as going up a small grade. The noise has a metallic/glass-like sound. I think it's inside.
The dealer has now made two attempts to find this noise, and it's driving my wife crazy. They've replaced a heat shield and re-mounted a line on the firewall near the cabin air filter assembly; both outside the cabin.
Advice anyone? Has anyone experienced or heard of this?