I have a 2011 Pro-4X kind of new to me. Anyway I’ve been bombarded with information about these cats breaking and blowing the motor. I have 150k on my Xterra. No lights or anything, exhaust smells a little gassy here and there. But I’m now left wondering do I need to replace these like now? I wasn’t entirely ready for this expense and my other car broke a flexplate and is in the shop currently setting my wallet on fire. Is the only real option $1300 for a new set? I keep seeing here and there Information about a design change in them around 2009 that makes engine failure less likely? Anyone have any real world experience you could give me a hand figuring out what I should do?