Rant: I chased a phantom rattle for three days and it was a loose quarter in the glove box
Customer came in with a 2018 Civic, said there was a terrible noise from the front end over bumps. I spent hours checking suspension, exhaust hangers, even the heat shields. I finally found the source when I opened the glove box and a single quarter fell out and rolled across the floor. The bill for the diag time was over $300. Always check the simple stuff first, right? What's the dumbest thing you've ever found causing a noise complaint?