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Foghorn noise intermittently coming from engine

1574 Views 1 Reply 2 Participants Last post by  pjksr02
My mom's 2011 has a foghorn sound coming from the engine while driving the car. Our Toyota dealership said the radiator was cracked on the bottom and she paid them $700 to install a new one. The foghorn noise went off again while I was driving the car today (new radiator was installed a week ago).

Is is this a warning sound? Any ideas? Thank you.
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