Belt squeal

#1
Hi all,
First post. My wife’s 2017 Corolla has an intermittent squeal while it’s running, and sometimes when engine is shut off. Her 1st Toyota care visit is in a few days. Any suggestions as to how to get service advisor to address this. It’s very random, but if they can’t duplicate it, they won’t address it. Is it common for a belt tensioner or idler pulley to fail so soon? Only 4500 miles. Thanks for the help
 
#3
I wonder if you said ok, I would like to trade it in and if they would turn it around and use it against you to fudge you on the price? This goes to any issues that Toyota claims are normal but aren't.
 
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