Hi folks,

I think I have had a cat converter failure on my 2012 4Runner. It happened all of a sudden when I was on the highway doing about 110 kph. It sounded like there was heavy rain on the roof initially, and then later when I slowed down and rolled down my window it sounded like a bunch of rocks in a metal can were strapped under the truck rattling around. When I corner at relatively slow speed, the rattling moves side to side.

My guess is the cat converter failed. Anyone have any experience with this?

I will take it in to a garage tomorrow for an assessment, but if anyone has any ideas I would be happy to hear them. Obviously, the cost of replacing one of these is not making me happy!

Thanks