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I live in Phoenix Arizona where the temperature was 110 today. I was driving down the road and I noticed the power steering went out of my 2008 Tribeca. So I pulled into a parking lot and realized that the rear diff light, battery light, and brake light were all on suddenly on my dash. I shut it off and let it rest for a few minutes. When I started it back up everything was still the same except my air conditioner wasn’t working either. It was 4pm and my usual mechanic just closed. I didn’t know what else to do so I just drove it home. Any ideas what could be wrong with it?
 

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Yup, I'm sure your serpentine belt broke, and I'm sure its because of the idler pulley bearing being shot. Replace the idler bearing and tensioner bearing and put on a new belt. There are a few posts about which parts to use and some DIYs on how to.
 
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